diff --git "a/evaluation/export.json" "b/evaluation/export.json"
new file mode 100644--- /dev/null
+++ "b/evaluation/export.json"
@@ -0,0 +1,6646 @@
+{
+  "run_dir": "art_3c5dbfc942580099ea75e8095e26ca25",
+  "source": "model",
+  "adapter_sha256": "60723ac470780ac7e8bfe7785c23665be2d5c5d6653cbd2fad653523214aea7d",
+  "source_sha256": "207483664dfef54c4c4438863260d3ba423bf3d6009b43fe84264b281e9fda23",
+  "checkpoint_sha256": {
+    "nvfp4-base": "602a1bc6a69c1a5c41253df785f335cea77eeeb854b985ab11c125bf1d08a547",
+    "nvfp4-merged": "9bc834f4dce29a48499b6614c11772d189710138b29c637a384f753b1326b4c0"
+  },
+  "loops": 2,
+  "recipe": "mse",
+  "encoding": "max-abs global F32 scale; FP8 E4M3 block-16 scales; E2M1 nearest-even",
+  "block_scale_search": "all 126 positive finite E4M3 scales; minimum block squared error; maxabs wins ties",
+  "merge": "W + (alpha/rank) * BF16(B) @ BF16(A), accumulated F32, stored BF16",
+  "recipe_reference": "https://github.com/NVIDIA/Model-Optimizer/blob/72e48d515a12d79784b37ca1ac8c92cc34e85d67/modelopt/torch/quantization/qtensor/nvfp4_tensor.py",
+  "calibration_reference": "https://github.com/NVIDIA/Model-Optimizer/blob/72e48d515a12d79784b37ca1ac8c92cc34e85d67/modelopt/torch/quantization/calib/mse.py",
+  "script_sha256": "cbd6c833654b1fff319abf1d8f3cb491af5d96b78d541e593a283b684268da04",
+  "quantizer_sha256": "baf5ad4237ff4390c41696a32ba97cb3b82ec87fe0bb78ea8878909f0a1b3772",
+  "projections": [
+    {
+      "name": "backbone.layers.0.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.56793212890625,
+        "squared_error": 27.054529190063477,
+        "changed_scale_blocks": 434964
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.64353942871094,
+        "squared_error": 27.120437622070312,
+        "changed_scale_blocks": 434924
+      },
+      "packed_byte_changes": 2094882,
+      "merged_bf16_changes": 10015065
+    },
+    {
+      "name": "backbone.layers.0.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.13469123840332,
+        "squared_error": 6.788881301879883,
+        "changed_scale_blocks": 107460
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.156957626342773,
+        "squared_error": 6.804623603820801,
+        "changed_scale_blocks": 107604
+      },
+      "packed_byte_changes": 549867,
+      "merged_bf16_changes": 2509077
+    },
+    {
+      "name": "backbone.layers.0.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.74720001220703,
+        "squared_error": 27.124553680419922,
+        "changed_scale_blocks": 438985
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.82270050048828,
+        "squared_error": 27.18092155456543,
+        "changed_scale_blocks": 438684
+      },
+      "packed_byte_changes": 2089604,
+      "merged_bf16_changes": 9982035
+    },
+    {
+      "name": "backbone.layers.0.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.586708068847656,
+        "squared_error": 27.041221618652344,
+        "changed_scale_blocks": 434725
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.679832458496094,
+        "squared_error": 27.106388092041016,
+        "changed_scale_blocks": 434825
+      },
+      "packed_byte_changes": 2120252,
+      "merged_bf16_changes": 10019313
+    },
+    {
+      "name": "backbone.layers.0.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.05076789855957,
+        "squared_error": 6.779272079467773,
+        "changed_scale_blocks": 106556
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.098959922790527,
+        "squared_error": 6.807531356811523,
+        "changed_scale_blocks": 106779
+      },
+      "packed_byte_changes": 561601,
+      "merged_bf16_changes": 2513056
+    },
+    {
+      "name": "backbone.layers.1.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.436214447021484,
+        "squared_error": 47.113182067871094,
+        "changed_scale_blocks": 753641
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.554100036621094,
+        "squared_error": 47.209930419921875,
+        "changed_scale_blocks": 753360
+      },
+      "packed_byte_changes": 3580658,
+      "merged_bf16_changes": 17481279
+    },
+    {
+      "name": "backbone.layers.1.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.39999389648438,
+        "squared_error": 47.31950378417969,
+        "changed_scale_blocks": 772854
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.61836242675781,
+        "squared_error": 47.44442367553711,
+        "changed_scale_blocks": 774693
+      },
+      "packed_byte_changes": 3924034,
+      "merged_bf16_changes": 17580372
+    },
+    {
+      "name": "backbone.layers.1.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.57077026367188,
+        "squared_error": 47.375186920166016,
+        "changed_scale_blocks": 770240
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.77439880371094,
+        "squared_error": 47.533302307128906,
+        "changed_scale_blocks": 769530
+      },
+      "packed_byte_changes": 4075007,
+      "merged_bf16_changes": 17595887
+    },
+    {
+      "name": "backbone.layers.10.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.840030670166016,
+        "squared_error": 27.052135467529297,
+        "changed_scale_blocks": 440732
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.97000503540039,
+        "squared_error": 27.144256591796875,
+        "changed_scale_blocks": 441152
+      },
+      "packed_byte_changes": 2338699,
+      "merged_bf16_changes": 10051882
+    },
+    {
+      "name": "backbone.layers.10.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.112932205200195,
+        "squared_error": 6.774394989013672,
+        "changed_scale_blocks": 108726
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.129868507385254,
+        "squared_error": 6.796084403991699,
+        "changed_scale_blocks": 108349
+      },
+      "packed_byte_changes": 566850,
+      "merged_bf16_changes": 2515352
+    },
+    {
+      "name": "backbone.layers.10.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.7869758605957,
+        "squared_error": 27.118873596191406,
+        "changed_scale_blocks": 437579
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.87635803222656,
+        "squared_error": 27.17495346069336,
+        "changed_scale_blocks": 437797
+      },
+      "packed_byte_changes": 2078707,
+      "merged_bf16_changes": 9985202
+    },
+    {
+      "name": "backbone.layers.10.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.634334564208984,
+        "squared_error": 27.07560157775879,
+        "changed_scale_blocks": 434490
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.77946853637695,
+        "squared_error": 27.177722930908203,
+        "changed_scale_blocks": 434807
+      },
+      "packed_byte_changes": 2332249,
+      "merged_bf16_changes": 10029721
+    },
+    {
+      "name": "backbone.layers.10.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.0637788772583,
+        "squared_error": 6.7910332679748535,
+        "changed_scale_blocks": 105881
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.096620559692383,
+        "squared_error": 6.8119401931762695,
+        "changed_scale_blocks": 105944
+      },
+      "packed_byte_changes": 542970,
+      "merged_bf16_changes": 2504080
+    },
+    {
+      "name": "backbone.layers.11.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.79780197143555,
+        "squared_error": 47.40611267089844,
+        "changed_scale_blocks": 753663
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.980857849121094,
+        "squared_error": 47.504966735839844,
+        "changed_scale_blocks": 755308
+      },
+      "packed_byte_changes": 3643222,
+      "merged_bf16_changes": 17490815
+    },
+    {
+      "name": "backbone.layers.11.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.2222671508789,
+        "squared_error": 47.36455154418945,
+        "changed_scale_blocks": 760207
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.36769104003906,
+        "squared_error": 47.48512268066406,
+        "changed_scale_blocks": 760547
+      },
+      "packed_byte_changes": 3884606,
+      "merged_bf16_changes": 17592729
+    },
+    {
+      "name": "backbone.layers.11.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.15992736816406,
+        "squared_error": 47.389957427978516,
+        "changed_scale_blocks": 760890
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.3367919921875,
+        "squared_error": 47.511634826660156,
+        "changed_scale_blocks": 760027
+      },
+      "packed_byte_changes": 3979195,
+      "merged_bf16_changes": 17623140
+    },
+    {
+      "name": "backbone.layers.12.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.739097595214844,
+        "squared_error": 27.045639038085938,
+        "changed_scale_blocks": 435098
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.885379791259766,
+        "squared_error": 27.141284942626953,
+        "changed_scale_blocks": 436176
+      },
+      "packed_byte_changes": 2348175,
+      "merged_bf16_changes": 10071142
+    },
+    {
+      "name": "backbone.layers.12.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.016687393188477,
+        "squared_error": 6.804931640625,
+        "changed_scale_blocks": 105958
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.055780410766602,
+        "squared_error": 6.8314313888549805,
+        "changed_scale_blocks": 105990
+      },
+      "packed_byte_changes": 566993,
+      "merged_bf16_changes": 2515191
+    },
+    {
+      "name": "backbone.layers.12.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.753135681152344,
+        "squared_error": 27.086475372314453,
+        "changed_scale_blocks": 439569
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.835044860839844,
+        "squared_error": 27.14173126220703,
+        "changed_scale_blocks": 439010
+      },
+      "packed_byte_changes": 2047995,
+      "merged_bf16_changes": 9987205
+    },
+    {
+      "name": "backbone.layers.12.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.62255859375,
+        "squared_error": 27.07930564880371,
+        "changed_scale_blocks": 432833
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.800968170166016,
+        "squared_error": 27.202857971191406,
+        "changed_scale_blocks": 433374
+      },
+      "packed_byte_changes": 2513294,
+      "merged_bf16_changes": 10093456
+    },
+    {
+      "name": "backbone.layers.12.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.050793647766113,
+        "squared_error": 6.8075995445251465,
+        "changed_scale_blocks": 105363
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.083625793457031,
+        "squared_error": 6.82252311706543,
+        "changed_scale_blocks": 105357
+      },
+      "packed_byte_changes": 534158,
+      "merged_bf16_changes": 2504889
+    },
+    {
+      "name": "backbone.layers.13.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.931339263916016,
+        "squared_error": 47.470767974853516,
+        "changed_scale_blocks": 754131
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.07542419433594,
+        "squared_error": 47.57240295410156,
+        "changed_scale_blocks": 753202
+      },
+      "packed_byte_changes": 3640000,
+      "merged_bf16_changes": 17481670
+    },
+    {
+      "name": "backbone.layers.13.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.21002960205078,
+        "squared_error": 47.406700134277344,
+        "changed_scale_blocks": 761706
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.37590026855469,
+        "squared_error": 47.584693908691406,
+        "changed_scale_blocks": 760881
+      },
+      "packed_byte_changes": 4130722,
+      "merged_bf16_changes": 17624393
+    },
+    {
+      "name": "backbone.layers.13.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.13106536865234,
+        "squared_error": 47.38280487060547,
+        "changed_scale_blocks": 763254
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.27314758300781,
+        "squared_error": 47.49352264404297,
+        "changed_scale_blocks": 763153
+      },
+      "packed_byte_changes": 3881613,
+      "merged_bf16_changes": 17596402
+    },
+    {
+      "name": "backbone.layers.14.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.6453742980957,
+        "squared_error": 27.116931915283203,
+        "changed_scale_blocks": 435785
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.92763900756836,
+        "squared_error": 27.319808959960938,
+        "changed_scale_blocks": 436224
+      },
+      "packed_byte_changes": 2671207,
+      "merged_bf16_changes": 10069655
+    },
+    {
+      "name": "backbone.layers.14.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.970661163330078,
+        "squared_error": 6.859411239624023,
+        "changed_scale_blocks": 103740
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.994955062866211,
+        "squared_error": 6.8796844482421875,
+        "changed_scale_blocks": 103933
+      },
+      "packed_byte_changes": 574002,
+      "merged_bf16_changes": 2520298
+    },
+    {
+      "name": "backbone.layers.14.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.50196075439453,
+        "squared_error": 27.13785171508789,
+        "changed_scale_blocks": 431675
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.536155700683594,
+        "squared_error": 27.17727279663086,
+        "changed_scale_blocks": 430965
+      },
+      "packed_byte_changes": 2001567,
+      "merged_bf16_changes": 9961474
+    },
+    {
+      "name": "backbone.layers.14.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.428714752197266,
+        "squared_error": 27.165325164794922,
+        "changed_scale_blocks": 428523
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.51548385620117,
+        "squared_error": 27.235729217529297,
+        "changed_scale_blocks": 428914
+      },
+      "packed_byte_changes": 2187677,
+      "merged_bf16_changes": 10042504
+    },
+    {
+      "name": "backbone.layers.14.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.993873596191406,
+        "squared_error": 6.8322954177856445,
+        "changed_scale_blocks": 103254
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.020578384399414,
+        "squared_error": 6.854691028594971,
+        "changed_scale_blocks": 103568
+      },
+      "packed_byte_changes": 527149,
+      "merged_bf16_changes": 2503899
+    },
+    {
+      "name": "backbone.layers.15.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.5236701965332,
+        "squared_error": 47.500614166259766,
+        "changed_scale_blocks": 747790
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.68345260620117,
+        "squared_error": 47.60614013671875,
+        "changed_scale_blocks": 748511
+      },
+      "packed_byte_changes": 3641626,
+      "merged_bf16_changes": 17461437
+    },
+    {
+      "name": "backbone.layers.15.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.90575408935547,
+        "squared_error": 47.40859603881836,
+        "changed_scale_blocks": 756530
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.16525268554688,
+        "squared_error": 47.59835433959961,
+        "changed_scale_blocks": 756420
+      },
+      "packed_byte_changes": 4189025,
+      "merged_bf16_changes": 17601186
+    },
+    {
+      "name": "backbone.layers.15.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.02972412109375,
+        "squared_error": 47.45419692993164,
+        "changed_scale_blocks": 755482
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.19737243652344,
+        "squared_error": 47.58234405517578,
+        "changed_scale_blocks": 756159
+      },
+      "packed_byte_changes": 3876033,
+      "merged_bf16_changes": 17604847
+    },
+    {
+      "name": "backbone.layers.16.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.41865539550781,
+        "squared_error": 27.162437438964844,
+        "changed_scale_blocks": 428650
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.66520309448242,
+        "squared_error": 27.315093994140625,
+        "changed_scale_blocks": 429291
+      },
+      "packed_byte_changes": 2454100,
+      "merged_bf16_changes": 10031280
+    },
+    {
+      "name": "backbone.layers.16.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.910487174987793,
+        "squared_error": 6.868203163146973,
+        "changed_scale_blocks": 102777
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.946792602539062,
+        "squared_error": 6.894364833831787,
+        "changed_scale_blocks": 102444
+      },
+      "packed_byte_changes": 594280,
+      "merged_bf16_changes": 2512190
+    },
+    {
+      "name": "backbone.layers.16.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.59331512451172,
+        "squared_error": 27.13104248046875,
+        "changed_scale_blocks": 431983
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.64288330078125,
+        "squared_error": 27.17746925354004,
+        "changed_scale_blocks": 431746
+      },
+      "packed_byte_changes": 1972409,
+      "merged_bf16_changes": 9940547
+    },
+    {
+      "name": "backbone.layers.16.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.08900451660156,
+        "squared_error": 27.276281356811523,
+        "changed_scale_blocks": 422251
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.21628952026367,
+        "squared_error": 27.372459411621094,
+        "changed_scale_blocks": 422818
+      },
+      "packed_byte_changes": 2394383,
+      "merged_bf16_changes": 10077587
+    },
+    {
+      "name": "backbone.layers.16.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.941841125488281,
+        "squared_error": 6.855693817138672,
+        "changed_scale_blocks": 101828
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.98011589050293,
+        "squared_error": 6.882214546203613,
+        "changed_scale_blocks": 101884
+      },
+      "packed_byte_changes": 523328,
+      "merged_bf16_changes": 2485311
+    },
+    {
+      "name": "backbone.layers.17.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.10968017578125,
+        "squared_error": 47.479793548583984,
+        "changed_scale_blocks": 756188
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.21755981445312,
+        "squared_error": 47.56600570678711,
+        "changed_scale_blocks": 755301
+      },
+      "packed_byte_changes": 3484525,
+      "merged_bf16_changes": 17422888
+    },
+    {
+      "name": "backbone.layers.17.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.13819122314453,
+        "squared_error": 47.41585922241211,
+        "changed_scale_blocks": 754445
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.34420776367188,
+        "squared_error": 47.572505950927734,
+        "changed_scale_blocks": 754618
+      },
+      "packed_byte_changes": 4112982,
+      "merged_bf16_changes": 17647221
+    },
+    {
+      "name": "backbone.layers.17.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.0208511352539,
+        "squared_error": 47.451873779296875,
+        "changed_scale_blocks": 752394
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.19557189941406,
+        "squared_error": 47.571468353271484,
+        "changed_scale_blocks": 753032
+      },
+      "packed_byte_changes": 3936300,
+      "merged_bf16_changes": 17611186
+    },
+    {
+      "name": "backbone.layers.18.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.612159729003906,
+        "squared_error": 27.066471099853516,
+        "changed_scale_blocks": 435469
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.77796173095703,
+        "squared_error": 27.184499740600586,
+        "changed_scale_blocks": 435309
+      },
+      "packed_byte_changes": 2445289,
+      "merged_bf16_changes": 10085436
+    },
+    {
+      "name": "backbone.layers.18.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.957234382629395,
+        "squared_error": 6.822916030883789,
+        "changed_scale_blocks": 103953
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.993890762329102,
+        "squared_error": 6.84952974319458,
+        "changed_scale_blocks": 104147
+      },
+      "packed_byte_changes": 604674,
+      "merged_bf16_changes": 2529096
+    },
+    {
+      "name": "backbone.layers.18.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.64729309082031,
+        "squared_error": 27.127403259277344,
+        "changed_scale_blocks": 432484
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.70751190185547,
+        "squared_error": 27.171558380126953,
+        "changed_scale_blocks": 432944
+      },
+      "packed_byte_changes": 2011529,
+      "merged_bf16_changes": 9957768
+    },
+    {
+      "name": "backbone.layers.18.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.14331817626953,
+        "squared_error": 27.210220336914062,
+        "changed_scale_blocks": 424311
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.30110168457031,
+        "squared_error": 27.325790405273438,
+        "changed_scale_blocks": 424792
+      },
+      "packed_byte_changes": 2411048,
+      "merged_bf16_changes": 10058525
+    },
+    {
+      "name": "backbone.layers.18.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.056896209716797,
+        "squared_error": 6.8292341232299805,
+        "changed_scale_blocks": 104704
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.084324836730957,
+        "squared_error": 6.8510332107543945,
+        "changed_scale_blocks": 104823
+      },
+      "packed_byte_changes": 537427,
+      "merged_bf16_changes": 2505607
+    },
+    {
+      "name": "backbone.layers.19.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.14530944824219,
+        "squared_error": 47.42831802368164,
+        "changed_scale_blocks": 758897
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.27040100097656,
+        "squared_error": 47.53883361816406,
+        "changed_scale_blocks": 759462
+      },
+      "packed_byte_changes": 3676034,
+      "merged_bf16_changes": 17485820
+    },
+    {
+      "name": "backbone.layers.19.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.01229858398438,
+        "squared_error": 47.4512939453125,
+        "changed_scale_blocks": 753055
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.27359008789062,
+        "squared_error": 47.61795425415039,
+        "changed_scale_blocks": 753049
+      },
+      "packed_byte_changes": 4207648,
+      "merged_bf16_changes": 17661652
+    },
+    {
+      "name": "backbone.layers.19.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.892913818359375,
+        "squared_error": 47.39109802246094,
+        "changed_scale_blocks": 756513
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.07403564453125,
+        "squared_error": 47.52857208251953,
+        "changed_scale_blocks": 756072
+      },
+      "packed_byte_changes": 3949469,
+      "merged_bf16_changes": 17610179
+    },
+    {
+      "name": "backbone.layers.2.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.77448272705078,
+        "squared_error": 27.030765533447266,
+        "changed_scale_blocks": 440284
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.905067443847656,
+        "squared_error": 27.118804931640625,
+        "changed_scale_blocks": 440886
+      },
+      "packed_byte_changes": 2331379,
+      "merged_bf16_changes": 10064228
+    },
+    {
+      "name": "backbone.layers.2.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.082761764526367,
+        "squared_error": 6.803312301635742,
+        "changed_scale_blocks": 106848
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.104716300964355,
+        "squared_error": 6.822260856628418,
+        "changed_scale_blocks": 106556
+      },
+      "packed_byte_changes": 594200,
+      "merged_bf16_changes": 2522908
+    },
+    {
+      "name": "backbone.layers.2.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.78772735595703,
+        "squared_error": 27.128934860229492,
+        "changed_scale_blocks": 440783
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.90254211425781,
+        "squared_error": 27.225204467773438,
+        "changed_scale_blocks": 440731
+      },
+      "packed_byte_changes": 2227355,
+      "merged_bf16_changes": 9997579
+    },
+    {
+      "name": "backbone.layers.2.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.55322265625,
+        "squared_error": 27.139564514160156,
+        "changed_scale_blocks": 433517
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.659088134765625,
+        "squared_error": 27.22863006591797,
+        "changed_scale_blocks": 432724
+      },
+      "packed_byte_changes": 2338701,
+      "merged_bf16_changes": 10075187
+    },
+    {
+      "name": "backbone.layers.2.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.123863220214844,
+        "squared_error": 6.799846649169922,
+        "changed_scale_blocks": 107745
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.162609100341797,
+        "squared_error": 6.829841136932373,
+        "changed_scale_blocks": 107777
+      },
+      "packed_byte_changes": 608338,
+      "merged_bf16_changes": 2515758
+    },
+    {
+      "name": "backbone.layers.20.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.47840118408203,
+        "squared_error": 27.09878921508789,
+        "changed_scale_blocks": 429512
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.6718864440918,
+        "squared_error": 27.24873924255371,
+        "changed_scale_blocks": 429636
+      },
+      "packed_byte_changes": 2457809,
+      "merged_bf16_changes": 10057703
+    },
+    {
+      "name": "backbone.layers.20.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.954449653625488,
+        "squared_error": 6.814853668212891,
+        "changed_scale_blocks": 103548
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.005058288574219,
+        "squared_error": 6.847256660461426,
+        "changed_scale_blocks": 103793
+      },
+      "packed_byte_changes": 608290,
+      "merged_bf16_changes": 2525083
+    },
+    {
+      "name": "backbone.layers.20.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.625831604003906,
+        "squared_error": 27.164897918701172,
+        "changed_scale_blocks": 430745
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.71808624267578,
+        "squared_error": 27.241649627685547,
+        "changed_scale_blocks": 431035
+      },
+      "packed_byte_changes": 2012607,
+      "merged_bf16_changes": 9910800
+    },
+    {
+      "name": "backbone.layers.20.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.12784957885742,
+        "squared_error": 27.204071044921875,
+        "changed_scale_blocks": 422835
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.26237487792969,
+        "squared_error": 27.314462661743164,
+        "changed_scale_blocks": 422951
+      },
+      "packed_byte_changes": 2395966,
+      "merged_bf16_changes": 10083280
+    },
+    {
+      "name": "backbone.layers.20.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.01357364654541,
+        "squared_error": 6.856293201446533,
+        "changed_scale_blocks": 103042
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.027425765991211,
+        "squared_error": 6.87813138961792,
+        "changed_scale_blocks": 103176
+      },
+      "packed_byte_changes": 554708,
+      "merged_bf16_changes": 2510377
+    },
+    {
+      "name": "backbone.layers.21.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.991355895996094,
+        "squared_error": 47.456565856933594,
+        "changed_scale_blocks": 755678
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.13379669189453,
+        "squared_error": 47.5694694519043,
+        "changed_scale_blocks": 755669
+      },
+      "packed_byte_changes": 3540329,
+      "merged_bf16_changes": 17437717
+    },
+    {
+      "name": "backbone.layers.21.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.78936004638672,
+        "squared_error": 47.48406982421875,
+        "changed_scale_blocks": 748908
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.03736114501953,
+        "squared_error": 47.664390563964844,
+        "changed_scale_blocks": 749809
+      },
+      "packed_byte_changes": 4102434,
+      "merged_bf16_changes": 17613365
+    },
+    {
+      "name": "backbone.layers.21.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.84050750732422,
+        "squared_error": 47.484683990478516,
+        "changed_scale_blocks": 745875
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.99045944213867,
+        "squared_error": 47.60504913330078,
+        "changed_scale_blocks": 745942
+      },
+      "packed_byte_changes": 3790296,
+      "merged_bf16_changes": 17578009
+    },
+    {
+      "name": "backbone.layers.22.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.60335922241211,
+        "squared_error": 27.121070861816406,
+        "changed_scale_blocks": 429419
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.78105926513672,
+        "squared_error": 27.24913787841797,
+        "changed_scale_blocks": 430059
+      },
+      "packed_byte_changes": 2522500,
+      "merged_bf16_changes": 10098643
+    },
+    {
+      "name": "backbone.layers.22.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.961618423461914,
+        "squared_error": 6.96592378616333,
+        "changed_scale_blocks": 101137
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.991783142089844,
+        "squared_error": 6.9862823486328125,
+        "changed_scale_blocks": 101266
+      },
+      "packed_byte_changes": 587340,
+      "merged_bf16_changes": 2525386
+    },
+    {
+      "name": "backbone.layers.22.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.67131423950195,
+        "squared_error": 27.19951057434082,
+        "changed_scale_blocks": 428904
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.71564483642578,
+        "squared_error": 27.24661636352539,
+        "changed_scale_blocks": 429431
+      },
+      "packed_byte_changes": 2020277,
+      "merged_bf16_changes": 9931977
+    },
+    {
+      "name": "backbone.layers.22.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.18889617919922,
+        "squared_error": 27.244613647460938,
+        "changed_scale_blocks": 422655
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.37016677856445,
+        "squared_error": 27.369813919067383,
+        "changed_scale_blocks": 423214
+      },
+      "packed_byte_changes": 2425671,
+      "merged_bf16_changes": 10074807
+    },
+    {
+      "name": "backbone.layers.22.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.027023315429688,
+        "squared_error": 6.850836753845215,
+        "changed_scale_blocks": 102786
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.053642272949219,
+        "squared_error": 6.876121520996094,
+        "changed_scale_blocks": 102791
+      },
+      "packed_byte_changes": 536057,
+      "merged_bf16_changes": 2486269
+    },
+    {
+      "name": "backbone.layers.23.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.04527282714844,
+        "squared_error": 47.428924560546875,
+        "changed_scale_blocks": 759079
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.15764617919922,
+        "squared_error": 47.50032424926758,
+        "changed_scale_blocks": 758779
+      },
+      "packed_byte_changes": 3314281,
+      "merged_bf16_changes": 17356289
+    },
+    {
+      "name": "backbone.layers.23.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.962127685546875,
+        "squared_error": 47.38285827636719,
+        "changed_scale_blocks": 757741
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.12702941894531,
+        "squared_error": 47.49626922607422,
+        "changed_scale_blocks": 757318
+      },
+      "packed_byte_changes": 3945552,
+      "merged_bf16_changes": 17620940
+    },
+    {
+      "name": "backbone.layers.23.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.10152435302734,
+        "squared_error": 47.38231658935547,
+        "changed_scale_blocks": 759941
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.22178649902344,
+        "squared_error": 47.51422119140625,
+        "changed_scale_blocks": 758787
+      },
+      "packed_byte_changes": 3959336,
+      "merged_bf16_changes": 17598337
+    },
+    {
+      "name": "backbone.layers.24.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.71173858642578,
+        "squared_error": 27.079927444458008,
+        "changed_scale_blocks": 436479
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.86252212524414,
+        "squared_error": 27.19440460205078,
+        "changed_scale_blocks": 436607
+      },
+      "packed_byte_changes": 2417346,
+      "merged_bf16_changes": 10077423
+    },
+    {
+      "name": "backbone.layers.24.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.003425598144531,
+        "squared_error": 6.809095859527588,
+        "changed_scale_blocks": 104732
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.023696899414062,
+        "squared_error": 6.826573371887207,
+        "changed_scale_blocks": 104645
+      },
+      "packed_byte_changes": 563470,
+      "merged_bf16_changes": 2513776
+    },
+    {
+      "name": "backbone.layers.24.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.8631591796875,
+        "squared_error": 27.085926055908203,
+        "changed_scale_blocks": 438623
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.911380767822266,
+        "squared_error": 27.13541603088379,
+        "changed_scale_blocks": 437779
+      },
+      "packed_byte_changes": 1941285,
+      "merged_bf16_changes": 9915708
+    },
+    {
+      "name": "backbone.layers.24.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.19871520996094,
+        "squared_error": 27.170562744140625,
+        "changed_scale_blocks": 426898
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.320030212402344,
+        "squared_error": 27.259170532226562,
+        "changed_scale_blocks": 426509
+      },
+      "packed_byte_changes": 2303969,
+      "merged_bf16_changes": 10046858
+    },
+    {
+      "name": "backbone.layers.24.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.069049835205078,
+        "squared_error": 6.801266670227051,
+        "changed_scale_blocks": 105872
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.090087890625,
+        "squared_error": 6.821489334106445,
+        "changed_scale_blocks": 106006
+      },
+      "packed_byte_changes": 542020,
+      "merged_bf16_changes": 2491835
+    },
+    {
+      "name": "backbone.layers.25.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.995872497558594,
+        "squared_error": 47.41883087158203,
+        "changed_scale_blocks": 759760
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.08768463134766,
+        "squared_error": 47.496490478515625,
+        "changed_scale_blocks": 759913
+      },
+      "packed_byte_changes": 3291463,
+      "merged_bf16_changes": 17366617
+    },
+    {
+      "name": "backbone.layers.25.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.99088668823242,
+        "squared_error": 47.379180908203125,
+        "changed_scale_blocks": 755542
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.2110824584961,
+        "squared_error": 47.53857421875,
+        "changed_scale_blocks": 755981
+      },
+      "packed_byte_changes": 4140314,
+      "merged_bf16_changes": 17621941
+    },
+    {
+      "name": "backbone.layers.25.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.12435913085938,
+        "squared_error": 47.393653869628906,
+        "changed_scale_blocks": 761647
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.3144760131836,
+        "squared_error": 47.540443420410156,
+        "changed_scale_blocks": 762056
+      },
+      "packed_byte_changes": 3946935,
+      "merged_bf16_changes": 17573477
+    },
+    {
+      "name": "backbone.layers.26.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.70680236816406,
+        "squared_error": 27.05986785888672,
+        "changed_scale_blocks": 435214
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.87453079223633,
+        "squared_error": 27.191089630126953,
+        "changed_scale_blocks": 434734
+      },
+      "packed_byte_changes": 2416969,
+      "merged_bf16_changes": 10062406
+    },
+    {
+      "name": "backbone.layers.26.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.064212799072266,
+        "squared_error": 6.787937164306641,
+        "changed_scale_blocks": 106485
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.096070289611816,
+        "squared_error": 6.816518783569336,
+        "changed_scale_blocks": 106373
+      },
+      "packed_byte_changes": 593066,
+      "merged_bf16_changes": 2521115
+    },
+    {
+      "name": "backbone.layers.26.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.77317428588867,
+        "squared_error": 27.033918380737305,
+        "changed_scale_blocks": 439935
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.79025650024414,
+        "squared_error": 27.08612632751465,
+        "changed_scale_blocks": 438673
+      },
+      "packed_byte_changes": 1840791,
+      "merged_bf16_changes": 9897911
+    },
+    {
+      "name": "backbone.layers.26.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.44761276245117,
+        "squared_error": 27.14809799194336,
+        "changed_scale_blocks": 431974
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.56886291503906,
+        "squared_error": 27.24574851989746,
+        "changed_scale_blocks": 431317
+      },
+      "packed_byte_changes": 2313103,
+      "merged_bf16_changes": 10055157
+    },
+    {
+      "name": "backbone.layers.26.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.025218963623047,
+        "squared_error": 6.813191890716553,
+        "changed_scale_blocks": 103952
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.03858470916748,
+        "squared_error": 6.823733329772949,
+        "changed_scale_blocks": 104014
+      },
+      "packed_byte_changes": 494170,
+      "merged_bf16_changes": 2494107
+    },
+    {
+      "name": "backbone.layers.27.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.96791076660156,
+        "squared_error": 47.416725158691406,
+        "changed_scale_blocks": 757445
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.11166381835938,
+        "squared_error": 47.518653869628906,
+        "changed_scale_blocks": 757622
+      },
+      "packed_byte_changes": 3442071,
+      "merged_bf16_changes": 17378538
+    },
+    {
+      "name": "backbone.layers.27.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.91527557373047,
+        "squared_error": 47.4300422668457,
+        "changed_scale_blocks": 755265
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.08857727050781,
+        "squared_error": 47.572486877441406,
+        "changed_scale_blocks": 754954
+      },
+      "packed_byte_changes": 4015404,
+      "merged_bf16_changes": 17603868
+    },
+    {
+      "name": "backbone.layers.27.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.86422348022461,
+        "squared_error": 47.41204071044922,
+        "changed_scale_blocks": 754380
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.04815673828125,
+        "squared_error": 47.539306640625,
+        "changed_scale_blocks": 755054
+      },
+      "packed_byte_changes": 3846109,
+      "merged_bf16_changes": 17576469
+    },
+    {
+      "name": "backbone.layers.28.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.563053131103516,
+        "squared_error": 27.081125259399414,
+        "changed_scale_blocks": 434744
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.74103546142578,
+        "squared_error": 27.196313858032227,
+        "changed_scale_blocks": 434275
+      },
+      "packed_byte_changes": 2433147,
+      "merged_bf16_changes": 10056915
+    },
+    {
+      "name": "backbone.layers.28.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.033262252807617,
+        "squared_error": 6.794902801513672,
+        "changed_scale_blocks": 105323
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.065530776977539,
+        "squared_error": 6.821264266967773,
+        "changed_scale_blocks": 105651
+      },
+      "packed_byte_changes": 570311,
+      "merged_bf16_changes": 2516693
+    },
+    {
+      "name": "backbone.layers.28.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.65633010864258,
+        "squared_error": 27.181106567382812,
+        "changed_scale_blocks": 431247
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.67401123046875,
+        "squared_error": 27.21933364868164,
+        "changed_scale_blocks": 430069
+      },
+      "packed_byte_changes": 1826576,
+      "merged_bf16_changes": 9880112
+    },
+    {
+      "name": "backbone.layers.28.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.483890533447266,
+        "squared_error": 27.10614013671875,
+        "changed_scale_blocks": 430950
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.61797332763672,
+        "squared_error": 27.217729568481445,
+        "changed_scale_blocks": 430991
+      },
+      "packed_byte_changes": 2408744,
+      "merged_bf16_changes": 10080943
+    },
+    {
+      "name": "backbone.layers.28.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.949706077575684,
+        "squared_error": 6.853264808654785,
+        "changed_scale_blocks": 101269
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.971803665161133,
+        "squared_error": 6.8700971603393555,
+        "changed_scale_blocks": 101399
+      },
+      "packed_byte_changes": 535711,
+      "merged_bf16_changes": 2503835
+    },
+    {
+      "name": "backbone.layers.29.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.74223709106445,
+        "squared_error": 47.54600143432617,
+        "changed_scale_blocks": 746459
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.83576583862305,
+        "squared_error": 47.60001754760742,
+        "changed_scale_blocks": 746737
+      },
+      "packed_byte_changes": 3183315,
+      "merged_bf16_changes": 17318801
+    },
+    {
+      "name": "backbone.layers.29.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.63849639892578,
+        "squared_error": 47.56550979614258,
+        "changed_scale_blocks": 740817
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.82256317138672,
+        "squared_error": 47.68706512451172,
+        "changed_scale_blocks": 741892
+      },
+      "packed_byte_changes": 3899179,
+      "merged_bf16_changes": 17579259
+    },
+    {
+      "name": "backbone.layers.29.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.643402099609375,
+        "squared_error": 47.510406494140625,
+        "changed_scale_blocks": 742078
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.82667541503906,
+        "squared_error": 47.64133071899414,
+        "changed_scale_blocks": 742512
+      },
+      "packed_byte_changes": 3813544,
+      "merged_bf16_changes": 17558461
+    },
+    {
+      "name": "backbone.layers.3.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.83732604980469,
+        "squared_error": 47.448753356933594,
+        "changed_scale_blocks": 755795
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.00119018554688,
+        "squared_error": 47.552642822265625,
+        "changed_scale_blocks": 755921
+      },
+      "packed_byte_changes": 3643842,
+      "merged_bf16_changes": 17506658
+    },
+    {
+      "name": "backbone.layers.3.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.35057067871094,
+        "squared_error": 47.28550338745117,
+        "changed_scale_blocks": 770157
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.5731201171875,
+        "squared_error": 47.44181442260742,
+        "changed_scale_blocks": 771042
+      },
+      "packed_byte_changes": 3971242,
+      "merged_bf16_changes": 17597405
+    },
+    {
+      "name": "backbone.layers.3.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.47018432617188,
+        "squared_error": 47.33487319946289,
+        "changed_scale_blocks": 769758
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.58030700683594,
+        "squared_error": 47.48486328125,
+        "changed_scale_blocks": 766895
+      },
+      "packed_byte_changes": 3964844,
+      "merged_bf16_changes": 17574709
+    },
+    {
+      "name": "backbone.layers.30.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.51323699951172,
+        "squared_error": 27.127275466918945,
+        "changed_scale_blocks": 427591
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.64283752441406,
+        "squared_error": 27.223670959472656,
+        "changed_scale_blocks": 427267
+      },
+      "packed_byte_changes": 2339495,
+      "merged_bf16_changes": 10037062
+    },
+    {
+      "name": "backbone.layers.30.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.59294319152832,
+        "squared_error": 6.813179016113281,
+        "changed_scale_blocks": 98540
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.613348007202148,
+        "squared_error": 6.8335771560668945,
+        "changed_scale_blocks": 98670
+      },
+      "packed_byte_changes": 569569,
+      "merged_bf16_changes": 2519679
+    },
+    {
+      "name": "backbone.layers.30.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.56007385253906,
+        "squared_error": 27.13707733154297,
+        "changed_scale_blocks": 430136
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.60805892944336,
+        "squared_error": 27.16585922241211,
+        "changed_scale_blocks": 430130
+      },
+      "packed_byte_changes": 1927079,
+      "merged_bf16_changes": 9913211
+    },
+    {
+      "name": "backbone.layers.30.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 35.97594451904297,
+        "squared_error": 27.300689697265625,
+        "changed_scale_blocks": 416647
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.07814025878906,
+        "squared_error": 27.370389938354492,
+        "changed_scale_blocks": 417117
+      },
+      "packed_byte_changes": 2173117,
+      "merged_bf16_changes": 10053468
+    },
+    {
+      "name": "backbone.layers.30.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.902606964111328,
+        "squared_error": 6.913654327392578,
+        "changed_scale_blocks": 98364
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.917821884155273,
+        "squared_error": 6.927826404571533,
+        "changed_scale_blocks": 98499
+      },
+      "packed_byte_changes": 503814,
+      "merged_bf16_changes": 2503255
+    },
+    {
+      "name": "backbone.layers.31.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.02537536621094,
+        "squared_error": 47.42814254760742,
+        "changed_scale_blocks": 756817
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.11172485351562,
+        "squared_error": 47.50090789794922,
+        "changed_scale_blocks": 756308
+      },
+      "packed_byte_changes": 3234298,
+      "merged_bf16_changes": 17319788
+    },
+    {
+      "name": "backbone.layers.31.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.75492858886719,
+        "squared_error": 47.4133186340332,
+        "changed_scale_blocks": 750102
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.90700912475586,
+        "squared_error": 47.52669906616211,
+        "changed_scale_blocks": 749370
+      },
+      "packed_byte_changes": 3846456,
+      "merged_bf16_changes": 17588540
+    },
+    {
+      "name": "backbone.layers.31.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.82606887817383,
+        "squared_error": 47.45951461791992,
+        "changed_scale_blocks": 749004
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.00785827636719,
+        "squared_error": 47.591407775878906,
+        "changed_scale_blocks": 748667
+      },
+      "packed_byte_changes": 3728580,
+      "merged_bf16_changes": 17498820
+    },
+    {
+      "name": "backbone.layers.32.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.56270217895508,
+        "squared_error": 27.070819854736328,
+        "changed_scale_blocks": 433692
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.71448516845703,
+        "squared_error": 27.173919677734375,
+        "changed_scale_blocks": 433840
+      },
+      "packed_byte_changes": 2316348,
+      "merged_bf16_changes": 10037074
+    },
+    {
+      "name": "backbone.layers.32.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.058204650878906,
+        "squared_error": 6.785831928253174,
+        "changed_scale_blocks": 105635
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.079750061035156,
+        "squared_error": 6.811295509338379,
+        "changed_scale_blocks": 105780
+      },
+      "packed_byte_changes": 571421,
+      "merged_bf16_changes": 2514487
+    },
+    {
+      "name": "backbone.layers.32.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.712059020996094,
+        "squared_error": 27.090225219726562,
+        "changed_scale_blocks": 437592
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.76802062988281,
+        "squared_error": 27.13926887512207,
+        "changed_scale_blocks": 437534
+      },
+      "packed_byte_changes": 1880066,
+      "merged_bf16_changes": 9894211
+    },
+    {
+      "name": "backbone.layers.32.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.32563781738281,
+        "squared_error": 27.165586471557617,
+        "changed_scale_blocks": 427966
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.41974639892578,
+        "squared_error": 27.226837158203125,
+        "changed_scale_blocks": 428257
+      },
+      "packed_byte_changes": 2042933,
+      "merged_bf16_changes": 9996383
+    },
+    {
+      "name": "backbone.layers.32.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.015520095825195,
+        "squared_error": 6.827552795410156,
+        "changed_scale_blocks": 103070
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.033891677856445,
+        "squared_error": 6.841629981994629,
+        "changed_scale_blocks": 103068
+      },
+      "packed_byte_changes": 478933,
+      "merged_bf16_changes": 2483435
+    },
+    {
+      "name": "backbone.layers.33.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.10975646972656,
+        "squared_error": 47.44975280761719,
+        "changed_scale_blocks": 755705
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.1598892211914,
+        "squared_error": 47.48780822753906,
+        "changed_scale_blocks": 755629
+      },
+      "packed_byte_changes": 2858804,
+      "merged_bf16_changes": 17185884
+    },
+    {
+      "name": "backbone.layers.33.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.85130310058594,
+        "squared_error": 47.42411804199219,
+        "changed_scale_blocks": 751215
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.04441833496094,
+        "squared_error": 47.54405212402344,
+        "changed_scale_blocks": 751241
+      },
+      "packed_byte_changes": 3696798,
+      "merged_bf16_changes": 17517962
+    },
+    {
+      "name": "backbone.layers.33.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.859832763671875,
+        "squared_error": 47.40791702270508,
+        "changed_scale_blocks": 753835
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.99737548828125,
+        "squared_error": 47.50971221923828,
+        "changed_scale_blocks": 753832
+      },
+      "packed_byte_changes": 3639756,
+      "merged_bf16_changes": 17530337
+    },
+    {
+      "name": "backbone.layers.34.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.5661735534668,
+        "squared_error": 27.06768035888672,
+        "changed_scale_blocks": 432058
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.7936897277832,
+        "squared_error": 27.23736000061035,
+        "changed_scale_blocks": 432721
+      },
+      "packed_byte_changes": 2576773,
+      "merged_bf16_changes": 10049735
+    },
+    {
+      "name": "backbone.layers.34.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.05767822265625,
+        "squared_error": 6.800314903259277,
+        "changed_scale_blocks": 105992
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.086889266967773,
+        "squared_error": 6.8227105140686035,
+        "changed_scale_blocks": 106000
+      },
+      "packed_byte_changes": 578479,
+      "merged_bf16_changes": 2518212
+    },
+    {
+      "name": "backbone.layers.34.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.793052673339844,
+        "squared_error": 27.11785888671875,
+        "changed_scale_blocks": 437543
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.85498809814453,
+        "squared_error": 27.15141487121582,
+        "changed_scale_blocks": 437780
+      },
+      "packed_byte_changes": 1701647,
+      "merged_bf16_changes": 9844595
+    },
+    {
+      "name": "backbone.layers.34.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.35059356689453,
+        "squared_error": 27.141254425048828,
+        "changed_scale_blocks": 428426
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.482601165771484,
+        "squared_error": 27.238216400146484,
+        "changed_scale_blocks": 428356
+      },
+      "packed_byte_changes": 2244082,
+      "merged_bf16_changes": 10032459
+    },
+    {
+      "name": "backbone.layers.34.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.978755950927734,
+        "squared_error": 6.843965530395508,
+        "changed_scale_blocks": 102008
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.007018089294434,
+        "squared_error": 6.859130859375,
+        "changed_scale_blocks": 101947
+      },
+      "packed_byte_changes": 487224,
+      "merged_bf16_changes": 2486747
+    },
+    {
+      "name": "backbone.layers.35.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.95600128173828,
+        "squared_error": 47.55970001220703,
+        "changed_scale_blocks": 756276
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.02386474609375,
+        "squared_error": 47.60801696777344,
+        "changed_scale_blocks": 756221
+      },
+      "packed_byte_changes": 2939597,
+      "merged_bf16_changes": 17187898
+    },
+    {
+      "name": "backbone.layers.35.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.83902359008789,
+        "squared_error": 47.50906753540039,
+        "changed_scale_blocks": 751543
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.999961853027344,
+        "squared_error": 47.619083404541016,
+        "changed_scale_blocks": 751205
+      },
+      "packed_byte_changes": 3797855,
+      "merged_bf16_changes": 17560626
+    },
+    {
+      "name": "backbone.layers.35.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.84233474731445,
+        "squared_error": 47.481380462646484,
+        "changed_scale_blocks": 752694
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.01268005371094,
+        "squared_error": 47.59815216064453,
+        "changed_scale_blocks": 752885
+      },
+      "packed_byte_changes": 3761396,
+      "merged_bf16_changes": 17553432
+    },
+    {
+      "name": "backbone.layers.36.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.61490249633789,
+        "squared_error": 27.072446823120117,
+        "changed_scale_blocks": 431674
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.73583984375,
+        "squared_error": 27.183006286621094,
+        "changed_scale_blocks": 431256
+      },
+      "packed_byte_changes": 2375187,
+      "merged_bf16_changes": 10049624
+    },
+    {
+      "name": "backbone.layers.36.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.06563663482666,
+        "squared_error": 6.810665607452393,
+        "changed_scale_blocks": 105575
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.090685844421387,
+        "squared_error": 6.832886695861816,
+        "changed_scale_blocks": 105333
+      },
+      "packed_byte_changes": 609919,
+      "merged_bf16_changes": 2524290
+    },
+    {
+      "name": "backbone.layers.36.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.61090087890625,
+        "squared_error": 27.135452270507812,
+        "changed_scale_blocks": 432993
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.68874740600586,
+        "squared_error": 27.174692153930664,
+        "changed_scale_blocks": 432824
+      },
+      "packed_byte_changes": 1837291,
+      "merged_bf16_changes": 9869804
+    },
+    {
+      "name": "backbone.layers.36.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.21887969970703,
+        "squared_error": 27.166831970214844,
+        "changed_scale_blocks": 424102
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.33198547363281,
+        "squared_error": 27.262371063232422,
+        "changed_scale_blocks": 423764
+      },
+      "packed_byte_changes": 2320416,
+      "merged_bf16_changes": 10032986
+    },
+    {
+      "name": "backbone.layers.36.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.918578147888184,
+        "squared_error": 6.890514373779297,
+        "changed_scale_blocks": 98647
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.939403533935547,
+        "squared_error": 6.902276039123535,
+        "changed_scale_blocks": 98753
+      },
+      "packed_byte_changes": 477623,
+      "merged_bf16_changes": 2489801
+    },
+    {
+      "name": "backbone.layers.37.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.2445068359375,
+        "squared_error": 47.46710968017578,
+        "changed_scale_blocks": 763559
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.29397583007812,
+        "squared_error": 47.51866149902344,
+        "changed_scale_blocks": 763695
+      },
+      "packed_byte_changes": 2758863,
+      "merged_bf16_changes": 17081121
+    },
+    {
+      "name": "backbone.layers.37.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.01371765136719,
+        "squared_error": 47.41359329223633,
+        "changed_scale_blocks": 756819
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.1575927734375,
+        "squared_error": 47.528076171875,
+        "changed_scale_blocks": 756533
+      },
+      "packed_byte_changes": 3814136,
+      "merged_bf16_changes": 17563604
+    },
+    {
+      "name": "backbone.layers.37.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.09864044189453,
+        "squared_error": 47.45244216918945,
+        "changed_scale_blocks": 758723
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.2398910522461,
+        "squared_error": 47.542259216308594,
+        "changed_scale_blocks": 759195
+      },
+      "packed_byte_changes": 3573079,
+      "merged_bf16_changes": 17486969
+    },
+    {
+      "name": "backbone.layers.38.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.66352844238281,
+        "squared_error": 27.079914093017578,
+        "changed_scale_blocks": 433292
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.75710678100586,
+        "squared_error": 27.15015983581543,
+        "changed_scale_blocks": 433571
+      },
+      "packed_byte_changes": 2204369,
+      "merged_bf16_changes": 10040425
+    },
+    {
+      "name": "backbone.layers.38.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.043045997619629,
+        "squared_error": 6.8354010581970215,
+        "changed_scale_blocks": 104886
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.050671577453613,
+        "squared_error": 6.8495073318481445,
+        "changed_scale_blocks": 104582
+      },
+      "packed_byte_changes": 503356,
+      "merged_bf16_changes": 2495617
+    },
+    {
+      "name": "backbone.layers.38.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.694908142089844,
+        "squared_error": 27.105579376220703,
+        "changed_scale_blocks": 434649
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.729736328125,
+        "squared_error": 27.137271881103516,
+        "changed_scale_blocks": 433862
+      },
+      "packed_byte_changes": 1630344,
+      "merged_bf16_changes": 9816398
+    },
+    {
+      "name": "backbone.layers.38.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.32619857788086,
+        "squared_error": 27.196975708007812,
+        "changed_scale_blocks": 424640
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.42517852783203,
+        "squared_error": 27.25893211364746,
+        "changed_scale_blocks": 424757
+      },
+      "packed_byte_changes": 2068089,
+      "merged_bf16_changes": 9975926
+    },
+    {
+      "name": "backbone.layers.38.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.96296215057373,
+        "squared_error": 6.851778507232666,
+        "changed_scale_blocks": 101386
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.974523544311523,
+        "squared_error": 6.864426612854004,
+        "changed_scale_blocks": 101384
+      },
+      "packed_byte_changes": 486031,
+      "merged_bf16_changes": 2492511
+    },
+    {
+      "name": "backbone.layers.39.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.36746215820312,
+        "squared_error": 47.45623016357422,
+        "changed_scale_blocks": 762019
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.44290161132812,
+        "squared_error": 47.51451110839844,
+        "changed_scale_blocks": 762146
+      },
+      "packed_byte_changes": 3040294,
+      "merged_bf16_changes": 17185085
+    },
+    {
+      "name": "backbone.layers.39.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.06636810302734,
+        "squared_error": 47.37819290161133,
+        "changed_scale_blocks": 756132
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.20793151855469,
+        "squared_error": 47.498695373535156,
+        "changed_scale_blocks": 755626
+      },
+      "packed_byte_changes": 3710952,
+      "merged_bf16_changes": 17528409
+    },
+    {
+      "name": "backbone.layers.39.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.16004943847656,
+        "squared_error": 47.43452453613281,
+        "changed_scale_blocks": 756163
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.31826782226562,
+        "squared_error": 47.57573699951172,
+        "changed_scale_blocks": 755645
+      },
+      "packed_byte_changes": 3808279,
+      "merged_bf16_changes": 17517212
+    },
+    {
+      "name": "backbone.layers.4.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.80106735229492,
+        "squared_error": 27.06269073486328,
+        "changed_scale_blocks": 437905
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.95250701904297,
+        "squared_error": 27.149215698242188,
+        "changed_scale_blocks": 438315
+      },
+      "packed_byte_changes": 2336294,
+      "merged_bf16_changes": 10060588
+    },
+    {
+      "name": "backbone.layers.4.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.088785171508789,
+        "squared_error": 6.793153285980225,
+        "changed_scale_blocks": 107713
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.125112533569336,
+        "squared_error": 6.818280220031738,
+        "changed_scale_blocks": 107628
+      },
+      "packed_byte_changes": 581893,
+      "merged_bf16_changes": 2518974
+    },
+    {
+      "name": "backbone.layers.4.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.78165817260742,
+        "squared_error": 27.13074493408203,
+        "changed_scale_blocks": 439219
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.87346649169922,
+        "squared_error": 27.223793029785156,
+        "changed_scale_blocks": 439254
+      },
+      "packed_byte_changes": 2255832,
+      "merged_bf16_changes": 10022138
+    },
+    {
+      "name": "backbone.layers.4.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.4749755859375,
+        "squared_error": 27.155635833740234,
+        "changed_scale_blocks": 434009
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.58317565917969,
+        "squared_error": 27.24495506286621,
+        "changed_scale_blocks": 433340
+      },
+      "packed_byte_changes": 2317572,
+      "merged_bf16_changes": 10076228
+    },
+    {
+      "name": "backbone.layers.4.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.142023086547852,
+        "squared_error": 6.782023906707764,
+        "changed_scale_blocks": 107606
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.15105152130127,
+        "squared_error": 6.798258304595947,
+        "changed_scale_blocks": 106973
+      },
+      "packed_byte_changes": 567620,
+      "merged_bf16_changes": 2505902
+    },
+    {
+      "name": "backbone.layers.40.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.696128845214844,
+        "squared_error": 27.078092575073242,
+        "changed_scale_blocks": 437304
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.82170486450195,
+        "squared_error": 27.168479919433594,
+        "changed_scale_blocks": 437416
+      },
+      "packed_byte_changes": 2343511,
+      "merged_bf16_changes": 10047826
+    },
+    {
+      "name": "backbone.layers.40.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.072616577148438,
+        "squared_error": 6.799140930175781,
+        "changed_scale_blocks": 105849
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.107688903808594,
+        "squared_error": 6.8239545822143555,
+        "changed_scale_blocks": 105924
+      },
+      "packed_byte_changes": 578208,
+      "merged_bf16_changes": 2515851
+    },
+    {
+      "name": "backbone.layers.40.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.79023361206055,
+        "squared_error": 27.10472869873047,
+        "changed_scale_blocks": 440129
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.8354377746582,
+        "squared_error": 27.139507293701172,
+        "changed_scale_blocks": 439656
+      },
+      "packed_byte_changes": 1795741,
+      "merged_bf16_changes": 9887790
+    },
+    {
+      "name": "backbone.layers.40.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.55284118652344,
+        "squared_error": 27.13604736328125,
+        "changed_scale_blocks": 434078
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.69804000854492,
+        "squared_error": 27.244781494140625,
+        "changed_scale_blocks": 434119
+      },
+      "packed_byte_changes": 2274205,
+      "merged_bf16_changes": 10031209
+    },
+    {
+      "name": "backbone.layers.40.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.914997100830078,
+        "squared_error": 6.862346649169922,
+        "changed_scale_blocks": 100933
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.943513870239258,
+        "squared_error": 6.8771467208862305,
+        "changed_scale_blocks": 100988
+      },
+      "packed_byte_changes": 498180,
+      "merged_bf16_changes": 2485003
+    },
+    {
+      "name": "backbone.layers.41.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.63038635253906,
+        "squared_error": 47.373016357421875,
+        "changed_scale_blocks": 773884
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.74267578125,
+        "squared_error": 47.439537048339844,
+        "changed_scale_blocks": 774511
+      },
+      "packed_byte_changes": 3010065,
+      "merged_bf16_changes": 17157501
+    },
+    {
+      "name": "backbone.layers.41.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.26085662841797,
+        "squared_error": 47.34027099609375,
+        "changed_scale_blocks": 761635
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.49362182617188,
+        "squared_error": 47.452449798583984,
+        "changed_scale_blocks": 763985
+      },
+      "packed_byte_changes": 3712369,
+      "merged_bf16_changes": 17539869
+    },
+    {
+      "name": "backbone.layers.41.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.29632568359375,
+        "squared_error": 47.3956298828125,
+        "changed_scale_blocks": 764927
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.40562438964844,
+        "squared_error": 47.4774284362793,
+        "changed_scale_blocks": 764864
+      },
+      "packed_byte_changes": 3390403,
+      "merged_bf16_changes": 17431677
+    },
+    {
+      "name": "backbone.layers.42.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.702842712402344,
+        "squared_error": 27.025035858154297,
+        "changed_scale_blocks": 437484
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.85614013671875,
+        "squared_error": 27.165054321289062,
+        "changed_scale_blocks": 436926
+      },
+      "packed_byte_changes": 2479062,
+      "merged_bf16_changes": 10056915
+    },
+    {
+      "name": "backbone.layers.42.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.143117904663086,
+        "squared_error": 6.7690887451171875,
+        "changed_scale_blocks": 107783
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.207053184509277,
+        "squared_error": 6.8169074058532715,
+        "changed_scale_blocks": 107844
+      },
+      "packed_byte_changes": 639608,
+      "merged_bf16_changes": 2518332
+    },
+    {
+      "name": "backbone.layers.42.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.904361724853516,
+        "squared_error": 27.106510162353516,
+        "changed_scale_blocks": 440415
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.9525260925293,
+        "squared_error": 27.1458797454834,
+        "changed_scale_blocks": 440302
+      },
+      "packed_byte_changes": 1863144,
+      "merged_bf16_changes": 9903172
+    },
+    {
+      "name": "backbone.layers.42.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.79168701171875,
+        "squared_error": 27.112302780151367,
+        "changed_scale_blocks": 439306
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.918067932128906,
+        "squared_error": 27.220001220703125,
+        "changed_scale_blocks": 438585
+      },
+      "packed_byte_changes": 2320129,
+      "merged_bf16_changes": 10020449
+    },
+    {
+      "name": "backbone.layers.42.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.082250595092773,
+        "squared_error": 6.803267478942871,
+        "changed_scale_blocks": 105899
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.097976684570312,
+        "squared_error": 6.816074848175049,
+        "changed_scale_blocks": 105830
+      },
+      "packed_byte_changes": 496679,
+      "merged_bf16_changes": 2494130
+    },
+    {
+      "name": "backbone.layers.43.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.59672546386719,
+        "squared_error": 47.360694885253906,
+        "changed_scale_blocks": 770015
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.68659973144531,
+        "squared_error": 47.43125534057617,
+        "changed_scale_blocks": 770677
+      },
+      "packed_byte_changes": 3016253,
+      "merged_bf16_changes": 17150225
+    },
+    {
+      "name": "backbone.layers.43.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.34446716308594,
+        "squared_error": 47.3411979675293,
+        "changed_scale_blocks": 765701
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.49988555908203,
+        "squared_error": 47.46274185180664,
+        "changed_scale_blocks": 766065
+      },
+      "packed_byte_changes": 3794695,
+      "merged_bf16_changes": 17549260
+    },
+    {
+      "name": "backbone.layers.43.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.28530883789062,
+        "squared_error": 47.36842346191406,
+        "changed_scale_blocks": 760333
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.43400573730469,
+        "squared_error": 47.46430587768555,
+        "changed_scale_blocks": 760198
+      },
+      "packed_byte_changes": 3447321,
+      "merged_bf16_changes": 17466975
+    },
+    {
+      "name": "backbone.layers.44.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.792442321777344,
+        "squared_error": 27.06794548034668,
+        "changed_scale_blocks": 439241
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.88636779785156,
+        "squared_error": 27.126380920410156,
+        "changed_scale_blocks": 439588
+      },
+      "packed_byte_changes": 2097299,
+      "merged_bf16_changes": 9996924
+    },
+    {
+      "name": "backbone.layers.44.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.14141845703125,
+        "squared_error": 6.779427528381348,
+        "changed_scale_blocks": 108109
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.15426254272461,
+        "squared_error": 6.797239780426025,
+        "changed_scale_blocks": 108169
+      },
+      "packed_byte_changes": 525965,
+      "merged_bf16_changes": 2497405
+    },
+    {
+      "name": "backbone.layers.44.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.85068893432617,
+        "squared_error": 27.077049255371094,
+        "changed_scale_blocks": 437475
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.89631652832031,
+        "squared_error": 27.097110748291016,
+        "changed_scale_blocks": 437713
+      },
+      "packed_byte_changes": 1653681,
+      "merged_bf16_changes": 9826812
+    },
+    {
+      "name": "backbone.layers.44.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.70995330810547,
+        "squared_error": 27.085586547851562,
+        "changed_scale_blocks": 439452
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.83536148071289,
+        "squared_error": 27.191450119018555,
+        "changed_scale_blocks": 438930
+      },
+      "packed_byte_changes": 2297051,
+      "merged_bf16_changes": 10016770
+    },
+    {
+      "name": "backbone.layers.44.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.081869125366211,
+        "squared_error": 6.803440570831299,
+        "changed_scale_blocks": 105373
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.10010051727295,
+        "squared_error": 6.814023017883301,
+        "changed_scale_blocks": 105433
+      },
+      "packed_byte_changes": 458791,
+      "merged_bf16_changes": 2480752
+    },
+    {
+      "name": "backbone.layers.45.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.57368469238281,
+        "squared_error": 47.40751647949219,
+        "changed_scale_blocks": 768782
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.64749145507812,
+        "squared_error": 47.467811584472656,
+        "changed_scale_blocks": 768264
+      },
+      "packed_byte_changes": 2804601,
+      "merged_bf16_changes": 17061600
+    },
+    {
+      "name": "backbone.layers.45.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.14527130126953,
+        "squared_error": 47.38916015625,
+        "changed_scale_blocks": 761650
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.28897094726562,
+        "squared_error": 47.49253845214844,
+        "changed_scale_blocks": 760929
+      },
+      "packed_byte_changes": 3768896,
+      "merged_bf16_changes": 17556773
+    },
+    {
+      "name": "backbone.layers.45.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.21233367919922,
+        "squared_error": 47.391910552978516,
+        "changed_scale_blocks": 762818
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.3114242553711,
+        "squared_error": 47.464962005615234,
+        "changed_scale_blocks": 762650
+      },
+      "packed_byte_changes": 3393666,
+      "merged_bf16_changes": 17451419
+    },
+    {
+      "name": "backbone.layers.46.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.793312072753906,
+        "squared_error": 27.069232940673828,
+        "changed_scale_blocks": 440375
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.878849029541016,
+        "squared_error": 27.125858306884766,
+        "changed_scale_blocks": 440095
+      },
+      "packed_byte_changes": 2014592,
+      "merged_bf16_changes": 9973815
+    },
+    {
+      "name": "backbone.layers.46.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.025177955627441,
+        "squared_error": 6.835558891296387,
+        "changed_scale_blocks": 104692
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.03026294708252,
+        "squared_error": 6.843270301818848,
+        "changed_scale_blocks": 104583
+      },
+      "packed_byte_changes": 388234,
+      "merged_bf16_changes": 2449508
+    },
+    {
+      "name": "backbone.layers.46.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.667667388916016,
+        "squared_error": 27.155208587646484,
+        "changed_scale_blocks": 434431
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.695281982421875,
+        "squared_error": 27.1744384765625,
+        "changed_scale_blocks": 434796
+      },
+      "packed_byte_changes": 1517986,
+      "merged_bf16_changes": 9751125
+    },
+    {
+      "name": "backbone.layers.46.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.498870849609375,
+        "squared_error": 27.21131706237793,
+        "changed_scale_blocks": 431444
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.540443420410156,
+        "squared_error": 27.255252838134766,
+        "changed_scale_blocks": 430871
+      },
+      "packed_byte_changes": 1710876,
+      "merged_bf16_changes": 9850795
+    },
+    {
+      "name": "backbone.layers.46.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.954573631286621,
+        "squared_error": 6.937809467315674,
+        "changed_scale_blocks": 100764
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.972150802612305,
+        "squared_error": 6.94871711730957,
+        "changed_scale_blocks": 100915
+      },
+      "packed_byte_changes": 440387,
+      "merged_bf16_changes": 2472055
+    },
+    {
+      "name": "backbone.layers.47.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.63693237304688,
+        "squared_error": 47.37879180908203,
+        "changed_scale_blocks": 776407
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.70797729492188,
+        "squared_error": 47.424896240234375,
+        "changed_scale_blocks": 776371
+      },
+      "packed_byte_changes": 2629068,
+      "merged_bf16_changes": 17044389
+    },
+    {
+      "name": "backbone.layers.47.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.40223693847656,
+        "squared_error": 47.347557067871094,
+        "changed_scale_blocks": 765998
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.577392578125,
+        "squared_error": 47.45609664916992,
+        "changed_scale_blocks": 766660
+      },
+      "packed_byte_changes": 3794300,
+      "merged_bf16_changes": 17556737
+    },
+    {
+      "name": "backbone.layers.47.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.42218017578125,
+        "squared_error": 47.3624267578125,
+        "changed_scale_blocks": 763066
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.53707885742188,
+        "squared_error": 47.44232177734375,
+        "changed_scale_blocks": 763087
+      },
+      "packed_byte_changes": 3383642,
+      "merged_bf16_changes": 17439867
+    },
+    {
+      "name": "backbone.layers.48.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.90557098388672,
+        "squared_error": 27.034095764160156,
+        "changed_scale_blocks": 441881
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 37.01151657104492,
+        "squared_error": 27.123878479003906,
+        "changed_scale_blocks": 441559
+      },
+      "packed_byte_changes": 2197017,
+      "merged_bf16_changes": 10007081
+    },
+    {
+      "name": "backbone.layers.48.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.115346908569336,
+        "squared_error": 6.7946014404296875,
+        "changed_scale_blocks": 107339
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.12849235534668,
+        "squared_error": 6.802264213562012,
+        "changed_scale_blocks": 107510
+      },
+      "packed_byte_changes": 414903,
+      "merged_bf16_changes": 2461216
+    },
+    {
+      "name": "backbone.layers.48.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.76905059814453,
+        "squared_error": 27.150436401367188,
+        "changed_scale_blocks": 437482
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.83323287963867,
+        "squared_error": 27.185867309570312,
+        "changed_scale_blocks": 438275
+      },
+      "packed_byte_changes": 1803334,
+      "merged_bf16_changes": 9875520
+    },
+    {
+      "name": "backbone.layers.48.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.64421844482422,
+        "squared_error": 27.11577606201172,
+        "changed_scale_blocks": 437289
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.70909881591797,
+        "squared_error": 27.16490364074707,
+        "changed_scale_blocks": 437508
+      },
+      "packed_byte_changes": 1815346,
+      "merged_bf16_changes": 9902357
+    },
+    {
+      "name": "backbone.layers.48.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.09391975402832,
+        "squared_error": 6.809078216552734,
+        "changed_scale_blocks": 106544
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.10519790649414,
+        "squared_error": 6.82123327255249,
+        "changed_scale_blocks": 106389
+      },
+      "packed_byte_changes": 484058,
+      "merged_bf16_changes": 2482739
+    },
+    {
+      "name": "backbone.layers.49.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.41964721679688,
+        "squared_error": 47.345645904541016,
+        "changed_scale_blocks": 773183
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.44599151611328,
+        "squared_error": 47.366355895996094,
+        "changed_scale_blocks": 771935
+      },
+      "packed_byte_changes": 2383739,
+      "merged_bf16_changes": 16886622
+    },
+    {
+      "name": "backbone.layers.49.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.36711120605469,
+        "squared_error": 47.40269470214844,
+        "changed_scale_blocks": 762912
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.54751586914062,
+        "squared_error": 47.52117156982422,
+        "changed_scale_blocks": 762860
+      },
+      "packed_byte_changes": 3902504,
+      "merged_bf16_changes": 17559776
+    },
+    {
+      "name": "backbone.layers.49.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.3221435546875,
+        "squared_error": 47.3704719543457,
+        "changed_scale_blocks": 767790
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.45811462402344,
+        "squared_error": 47.45301055908203,
+        "changed_scale_blocks": 768558
+      },
+      "packed_byte_changes": 3438146,
+      "merged_bf16_changes": 17458112
+    },
+    {
+      "name": "backbone.layers.5.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.39225769042969,
+        "squared_error": 47.38941955566406,
+        "changed_scale_blocks": 765078
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.47270202636719,
+        "squared_error": 47.466609954833984,
+        "changed_scale_blocks": 764791
+      },
+      "packed_byte_changes": 3503660,
+      "merged_bf16_changes": 17448693
+    },
+    {
+      "name": "backbone.layers.5.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.29411315917969,
+        "squared_error": 47.353553771972656,
+        "changed_scale_blocks": 762521
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.49703979492188,
+        "squared_error": 47.514488220214844,
+        "changed_scale_blocks": 762847
+      },
+      "packed_byte_changes": 3998741,
+      "merged_bf16_changes": 17599034
+    },
+    {
+      "name": "backbone.layers.5.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.35105895996094,
+        "squared_error": 47.41653823852539,
+        "changed_scale_blocks": 760784
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.68495178222656,
+        "squared_error": 47.64424133300781,
+        "changed_scale_blocks": 761341
+      },
+      "packed_byte_changes": 4336221,
+      "merged_bf16_changes": 17634178
+    },
+    {
+      "name": "backbone.layers.50.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.758140563964844,
+        "squared_error": 27.079242706298828,
+        "changed_scale_blocks": 437042
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.944908142089844,
+        "squared_error": 27.2027645111084,
+        "changed_scale_blocks": 437268
+      },
+      "packed_byte_changes": 2503898,
+      "merged_bf16_changes": 10079540
+    },
+    {
+      "name": "backbone.layers.50.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.186426162719727,
+        "squared_error": 6.784610748291016,
+        "changed_scale_blocks": 108703
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.221246719360352,
+        "squared_error": 6.816903114318848,
+        "changed_scale_blocks": 108745
+      },
+      "packed_byte_changes": 593780,
+      "merged_bf16_changes": 2510516
+    },
+    {
+      "name": "backbone.layers.50.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.84041976928711,
+        "squared_error": 27.08840560913086,
+        "changed_scale_blocks": 438121
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.89609909057617,
+        "squared_error": 27.13016700744629,
+        "changed_scale_blocks": 438466
+      },
+      "packed_byte_changes": 1680068,
+      "merged_bf16_changes": 9828753
+    },
+    {
+      "name": "backbone.layers.50.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.65130615234375,
+        "squared_error": 27.104459762573242,
+        "changed_scale_blocks": 437778
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.72466278076172,
+        "squared_error": 27.157421112060547,
+        "changed_scale_blocks": 438014
+      },
+      "packed_byte_changes": 2055984,
+      "merged_bf16_changes": 9991311
+    },
+    {
+      "name": "backbone.layers.50.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.090298652648926,
+        "squared_error": 6.788950443267822,
+        "changed_scale_blocks": 106103
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.120576858520508,
+        "squared_error": 6.805753707885742,
+        "changed_scale_blocks": 106250
+      },
+      "packed_byte_changes": 538771,
+      "merged_bf16_changes": 2502182
+    },
+    {
+      "name": "backbone.layers.51.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.23524475097656,
+        "squared_error": 47.50982666015625,
+        "changed_scale_blocks": 760064
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.28205871582031,
+        "squared_error": 47.53447341918945,
+        "changed_scale_blocks": 760267
+      },
+      "packed_byte_changes": 2362196,
+      "merged_bf16_changes": 16857270
+    },
+    {
+      "name": "backbone.layers.51.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.0574951171875,
+        "squared_error": 47.48149490356445,
+        "changed_scale_blocks": 753882
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.15447998046875,
+        "squared_error": 47.55788040161133,
+        "changed_scale_blocks": 752983
+      },
+      "packed_byte_changes": 3560338,
+      "merged_bf16_changes": 17498771
+    },
+    {
+      "name": "backbone.layers.51.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.07025146484375,
+        "squared_error": 47.421905517578125,
+        "changed_scale_blocks": 755311
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.1597671508789,
+        "squared_error": 47.48921585083008,
+        "changed_scale_blocks": 755159
+      },
+      "packed_byte_changes": 3156393,
+      "merged_bf16_changes": 17366427
+    },
+    {
+      "name": "backbone.layers.52.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.68498229980469,
+        "squared_error": 27.096630096435547,
+        "changed_scale_blocks": 436657
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.873878479003906,
+        "squared_error": 27.22201919555664,
+        "changed_scale_blocks": 436857
+      },
+      "packed_byte_changes": 2447332,
+      "merged_bf16_changes": 10062141
+    },
+    {
+      "name": "backbone.layers.52.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.127819061279297,
+        "squared_error": 6.783406734466553,
+        "changed_scale_blocks": 108081
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.16491413116455,
+        "squared_error": 6.802809238433838,
+        "changed_scale_blocks": 108002
+      },
+      "packed_byte_changes": 548860,
+      "merged_bf16_changes": 2503079
+    },
+    {
+      "name": "backbone.layers.52.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.722373962402344,
+        "squared_error": 27.148597717285156,
+        "changed_scale_blocks": 435876
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.75126647949219,
+        "squared_error": 27.19025230407715,
+        "changed_scale_blocks": 434874
+      },
+      "packed_byte_changes": 1868432,
+      "merged_bf16_changes": 9887328
+    },
+    {
+      "name": "backbone.layers.52.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.634056091308594,
+        "squared_error": 27.108367919921875,
+        "changed_scale_blocks": 436306
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.737388610839844,
+        "squared_error": 27.188602447509766,
+        "changed_scale_blocks": 436079
+      },
+      "packed_byte_changes": 2200047,
+      "merged_bf16_changes": 10006779
+    },
+    {
+      "name": "backbone.layers.52.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.03420352935791,
+        "squared_error": 6.8282976150512695,
+        "changed_scale_blocks": 104281
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.051586151123047,
+        "squared_error": 6.845522880554199,
+        "changed_scale_blocks": 104353
+      },
+      "packed_byte_changes": 473106,
+      "merged_bf16_changes": 2485829
+    },
+    {
+      "name": "backbone.layers.53.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.974884033203125,
+        "squared_error": 47.60799789428711,
+        "changed_scale_blocks": 749351
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.02677917480469,
+        "squared_error": 47.64311218261719,
+        "changed_scale_blocks": 748489
+      },
+      "packed_byte_changes": 2472075,
+      "merged_bf16_changes": 16962169
+    },
+    {
+      "name": "backbone.layers.53.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.73616027832031,
+        "squared_error": 47.52339553833008,
+        "changed_scale_blocks": 751214
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.82872772216797,
+        "squared_error": 47.58670425415039,
+        "changed_scale_blocks": 751039
+      },
+      "packed_byte_changes": 3408366,
+      "merged_bf16_changes": 17456385
+    },
+    {
+      "name": "backbone.layers.53.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.06885528564453,
+        "squared_error": 47.444419860839844,
+        "changed_scale_blocks": 759853
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.15724182128906,
+        "squared_error": 47.51889419555664,
+        "changed_scale_blocks": 759429
+      },
+      "packed_byte_changes": 3153843,
+      "merged_bf16_changes": 17364509
+    },
+    {
+      "name": "backbone.layers.54.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.77338409423828,
+        "squared_error": 27.0487060546875,
+        "changed_scale_blocks": 438169
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.85128402709961,
+        "squared_error": 27.1108455657959,
+        "changed_scale_blocks": 438386
+      },
+      "packed_byte_changes": 1918596,
+      "merged_bf16_changes": 9942395
+    },
+    {
+      "name": "backbone.layers.54.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.903303146362305,
+        "squared_error": 6.866729736328125,
+        "changed_scale_blocks": 102124
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.911737442016602,
+        "squared_error": 6.872180938720703,
+        "changed_scale_blocks": 102082
+      },
+      "packed_byte_changes": 338321,
+      "merged_bf16_changes": 2408628
+    },
+    {
+      "name": "backbone.layers.54.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.834659576416016,
+        "squared_error": 27.135875701904297,
+        "changed_scale_blocks": 438527
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.863853454589844,
+        "squared_error": 27.159587860107422,
+        "changed_scale_blocks": 438602
+      },
+      "packed_byte_changes": 1516399,
+      "merged_bf16_changes": 9738203
+    },
+    {
+      "name": "backbone.layers.54.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.37459182739258,
+        "squared_error": 27.238096237182617,
+        "changed_scale_blocks": 429520
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.44487762451172,
+        "squared_error": 27.284507751464844,
+        "changed_scale_blocks": 429541
+      },
+      "packed_byte_changes": 1917807,
+      "merged_bf16_changes": 9927477
+    },
+    {
+      "name": "backbone.layers.54.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.77547550201416,
+        "squared_error": 6.9699506759643555,
+        "changed_scale_blocks": 95355
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.784700393676758,
+        "squared_error": 6.977235794067383,
+        "changed_scale_blocks": 95217
+      },
+      "packed_byte_changes": 388935,
+      "merged_bf16_changes": 2458238
+    },
+    {
+      "name": "backbone.layers.55.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.35445404052734,
+        "squared_error": 47.359901428222656,
+        "changed_scale_blocks": 769695
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.40531921386719,
+        "squared_error": 47.408878326416016,
+        "changed_scale_blocks": 768736
+      },
+      "packed_byte_changes": 2850556,
+      "merged_bf16_changes": 17143353
+    },
+    {
+      "name": "backbone.layers.55.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.37393188476562,
+        "squared_error": 47.35872268676758,
+        "changed_scale_blocks": 763235
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.61998748779297,
+        "squared_error": 47.48493194580078,
+        "changed_scale_blocks": 764609
+      },
+      "packed_byte_changes": 3994854,
+      "merged_bf16_changes": 17565223
+    },
+    {
+      "name": "backbone.layers.55.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.34895324707031,
+        "squared_error": 47.36958312988281,
+        "changed_scale_blocks": 769341
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.5047607421875,
+        "squared_error": 47.49357604980469,
+        "changed_scale_blocks": 768322
+      },
+      "packed_byte_changes": 3643438,
+      "merged_bf16_changes": 17481835
+    },
+    {
+      "name": "backbone.layers.56.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.89326858520508,
+        "squared_error": 27.035385131835938,
+        "changed_scale_blocks": 442730
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.964141845703125,
+        "squared_error": 27.103363037109375,
+        "changed_scale_blocks": 442256
+      },
+      "packed_byte_changes": 1901019,
+      "merged_bf16_changes": 9773961
+    },
+    {
+      "name": "backbone.layers.56.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.085417747497559,
+        "squared_error": 6.80237340927124,
+        "changed_scale_blocks": 107080
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.207721710205078,
+        "squared_error": 6.891099452972412,
+        "changed_scale_blocks": 107465
+      },
+      "packed_byte_changes": 699565,
+      "merged_bf16_changes": 2485118
+    },
+    {
+      "name": "backbone.layers.56.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.81955337524414,
+        "squared_error": 27.123279571533203,
+        "changed_scale_blocks": 437339
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.847713470458984,
+        "squared_error": 27.140914916992188,
+        "changed_scale_blocks": 437479
+      },
+      "packed_byte_changes": 1127141,
+      "merged_bf16_changes": 9348539
+    },
+    {
+      "name": "backbone.layers.56.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.567893981933594,
+        "squared_error": 27.125709533691406,
+        "changed_scale_blocks": 436547
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.69207763671875,
+        "squared_error": 27.210403442382812,
+        "changed_scale_blocks": 437029
+      },
+      "packed_byte_changes": 1863706,
+      "merged_bf16_changes": 9740385
+    },
+    {
+      "name": "backbone.layers.56.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.069998741149902,
+        "squared_error": 6.810283184051514,
+        "changed_scale_blocks": 105973
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.088482856750488,
+        "squared_error": 6.826172351837158,
+        "changed_scale_blocks": 105859
+      },
+      "packed_byte_changes": 477392,
+      "merged_bf16_changes": 2461086
+    },
+    {
+      "name": "backbone.layers.57.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.57718658447266,
+        "squared_error": 47.36814880371094,
+        "changed_scale_blocks": 775834
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.60700988769531,
+        "squared_error": 47.3777961730957,
+        "changed_scale_blocks": 775935
+      },
+      "packed_byte_changes": 1701135,
+      "merged_bf16_changes": 15868353
+    },
+    {
+      "name": "backbone.layers.57.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.46617126464844,
+        "squared_error": 47.33961486816406,
+        "changed_scale_blocks": 772993
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.61878967285156,
+        "squared_error": 47.432159423828125,
+        "changed_scale_blocks": 773116
+      },
+      "packed_byte_changes": 3329010,
+      "merged_bf16_changes": 17330539
+    },
+    {
+      "name": "backbone.layers.57.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.60365295410156,
+        "squared_error": 47.39603042602539,
+        "changed_scale_blocks": 771219
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.66046905517578,
+        "squared_error": 47.42669677734375,
+        "changed_scale_blocks": 771307
+      },
+      "packed_byte_changes": 2482693,
+      "merged_bf16_changes": 16946986
+    },
+    {
+      "name": "backbone.layers.58.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.93636703491211,
+        "squared_error": 27.02027130126953,
+        "changed_scale_blocks": 442826
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.98753356933594,
+        "squared_error": 27.058082580566406,
+        "changed_scale_blocks": 442688
+      },
+      "packed_byte_changes": 1712083,
+      "merged_bf16_changes": 9813678
+    },
+    {
+      "name": "backbone.layers.58.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.088777542114258,
+        "squared_error": 6.7967753410339355,
+        "changed_scale_blocks": 107652
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.145649909973145,
+        "squared_error": 6.834855079650879,
+        "changed_scale_blocks": 107953
+      },
+      "packed_byte_changes": 595803,
+      "merged_bf16_changes": 2505013
+    },
+    {
+      "name": "backbone.layers.58.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.86149597167969,
+        "squared_error": 27.07076644897461,
+        "changed_scale_blocks": 441166
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.91656494140625,
+        "squared_error": 27.104923248291016,
+        "changed_scale_blocks": 440726
+      },
+      "packed_byte_changes": 1564734,
+      "merged_bf16_changes": 9566836
+    },
+    {
+      "name": "backbone.layers.58.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.628273010253906,
+        "squared_error": 27.146404266357422,
+        "changed_scale_blocks": 438679
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.791297912597656,
+        "squared_error": 27.268714904785156,
+        "changed_scale_blocks": 438402
+      },
+      "packed_byte_changes": 2096061,
+      "merged_bf16_changes": 9818378
+    },
+    {
+      "name": "backbone.layers.58.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.140776634216309,
+        "squared_error": 6.800271034240723,
+        "changed_scale_blocks": 106960
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.149040222167969,
+        "squared_error": 6.804337024688721,
+        "changed_scale_blocks": 107042
+      },
+      "packed_byte_changes": 326695,
+      "merged_bf16_changes": 2403429
+    },
+    {
+      "name": "backbone.layers.59.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.66641235351562,
+        "squared_error": 47.37487030029297,
+        "changed_scale_blocks": 773642
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.69369506835938,
+        "squared_error": 47.383907318115234,
+        "changed_scale_blocks": 774133
+      },
+      "packed_byte_changes": 1506066,
+      "merged_bf16_changes": 15603219
+    },
+    {
+      "name": "backbone.layers.59.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.57527923583984,
+        "squared_error": 47.330299377441406,
+        "changed_scale_blocks": 771329
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.72793579101562,
+        "squared_error": 47.44818878173828,
+        "changed_scale_blocks": 770631
+      },
+      "packed_byte_changes": 3421195,
+      "merged_bf16_changes": 17308315
+    },
+    {
+      "name": "backbone.layers.59.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.47987365722656,
+        "squared_error": 47.34129333496094,
+        "changed_scale_blocks": 766001
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.53377532958984,
+        "squared_error": 47.36557388305664,
+        "changed_scale_blocks": 766291
+      },
+      "packed_byte_changes": 2217419,
+      "merged_bf16_changes": 16768238
+    },
+    {
+      "name": "backbone.layers.6.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.78057098388672,
+        "squared_error": 27.054584503173828,
+        "changed_scale_blocks": 436453
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.879024505615234,
+        "squared_error": 27.146188735961914,
+        "changed_scale_blocks": 436496
+      },
+      "packed_byte_changes": 2205317,
+      "merged_bf16_changes": 10033822
+    },
+    {
+      "name": "backbone.layers.6.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.038930892944336,
+        "squared_error": 6.8026251792907715,
+        "changed_scale_blocks": 106118
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.065866470336914,
+        "squared_error": 6.819555282592773,
+        "changed_scale_blocks": 106589
+      },
+      "packed_byte_changes": 567885,
+      "merged_bf16_changes": 2512487
+    },
+    {
+      "name": "backbone.layers.6.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.57312774658203,
+        "squared_error": 27.112180709838867,
+        "changed_scale_blocks": 435357
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.56135559082031,
+        "squared_error": 27.203670501708984,
+        "changed_scale_blocks": 432427
+      },
+      "packed_byte_changes": 2262686,
+      "merged_bf16_changes": 10013075
+    },
+    {
+      "name": "backbone.layers.6.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.2861213684082,
+        "squared_error": 27.18181800842285,
+        "changed_scale_blocks": 428142
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.3906364440918,
+        "squared_error": 27.274734497070312,
+        "changed_scale_blocks": 427638
+      },
+      "packed_byte_changes": 2358280,
+      "merged_bf16_changes": 10052090
+    },
+    {
+      "name": "backbone.layers.6.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.037820816040039,
+        "squared_error": 6.796923637390137,
+        "changed_scale_blocks": 105511
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.064432144165039,
+        "squared_error": 6.8204569816589355,
+        "changed_scale_blocks": 105715
+      },
+      "packed_byte_changes": 535878,
+      "merged_bf16_changes": 2502428
+    },
+    {
+      "name": "backbone.layers.60.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.857357025146484,
+        "squared_error": 27.031274795532227,
+        "changed_scale_blocks": 442358
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.90869903564453,
+        "squared_error": 27.061687469482422,
+        "changed_scale_blocks": 442298
+      },
+      "packed_byte_changes": 1605686,
+      "merged_bf16_changes": 9780531
+    },
+    {
+      "name": "backbone.layers.60.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.018882751464844,
+        "squared_error": 6.82746696472168,
+        "changed_scale_blocks": 105559
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.025696754455566,
+        "squared_error": 6.841034889221191,
+        "changed_scale_blocks": 105458
+      },
+      "packed_byte_changes": 385840,
+      "merged_bf16_changes": 2423385
+    },
+    {
+      "name": "backbone.layers.60.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.99945068359375,
+        "squared_error": 27.085704803466797,
+        "changed_scale_blocks": 444673
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 37.033348083496094,
+        "squared_error": 27.113183975219727,
+        "changed_scale_blocks": 444705
+      },
+      "packed_byte_changes": 1377885,
+      "merged_bf16_changes": 9422336
+    },
+    {
+      "name": "backbone.layers.60.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.434783935546875,
+        "squared_error": 27.2128963470459,
+        "changed_scale_blocks": 431464
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.46234130859375,
+        "squared_error": 27.241310119628906,
+        "changed_scale_blocks": 431506
+      },
+      "packed_byte_changes": 1466262,
+      "merged_bf16_changes": 9698941
+    },
+    {
+      "name": "backbone.layers.60.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.029885292053223,
+        "squared_error": 6.846529960632324,
+        "changed_scale_blocks": 104670
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.041875839233398,
+        "squared_error": 6.852506637573242,
+        "changed_scale_blocks": 104639
+      },
+      "packed_byte_changes": 333100,
+      "merged_bf16_changes": 2405466
+    },
+    {
+      "name": "backbone.layers.61.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.68057250976562,
+        "squared_error": 47.383399963378906,
+        "changed_scale_blocks": 778051
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.6886978149414,
+        "squared_error": 47.38640594482422,
+        "changed_scale_blocks": 777621
+      },
+      "packed_byte_changes": 1277110,
+      "merged_bf16_changes": 15259093
+    },
+    {
+      "name": "backbone.layers.61.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.5614013671875,
+        "squared_error": 47.39662170410156,
+        "changed_scale_blocks": 771134
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.68569946289062,
+        "squared_error": 47.4802131652832,
+        "changed_scale_blocks": 771017
+      },
+      "packed_byte_changes": 3038725,
+      "merged_bf16_changes": 17175659
+    },
+    {
+      "name": "backbone.layers.61.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.60296630859375,
+        "squared_error": 47.42181396484375,
+        "changed_scale_blocks": 769675
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.6435546875,
+        "squared_error": 47.455909729003906,
+        "changed_scale_blocks": 769787
+      },
+      "packed_byte_changes": 2144195,
+      "merged_bf16_changes": 16654907
+    },
+    {
+      "name": "backbone.layers.62.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.84571838378906,
+        "squared_error": 27.03003692626953,
+        "changed_scale_blocks": 438205
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.86888885498047,
+        "squared_error": 27.054195404052734,
+        "changed_scale_blocks": 438140
+      },
+      "packed_byte_changes": 1412726,
+      "merged_bf16_changes": 9662181
+    },
+    {
+      "name": "backbone.layers.62.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.88232421875,
+        "squared_error": 6.855838775634766,
+        "changed_scale_blocks": 101880
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.9035005569458,
+        "squared_error": 6.873172760009766,
+        "changed_scale_blocks": 101728
+      },
+      "packed_byte_changes": 493048,
+      "merged_bf16_changes": 2464571
+    },
+    {
+      "name": "backbone.layers.62.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.93605041503906,
+        "squared_error": 27.083555221557617,
+        "changed_scale_blocks": 444148
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.93968200683594,
+        "squared_error": 27.09088134765625,
+        "changed_scale_blocks": 444042
+      },
+      "packed_byte_changes": 892463,
+      "merged_bf16_changes": 8989087
+    },
+    {
+      "name": "backbone.layers.62.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.239437103271484,
+        "squared_error": 27.265365600585938,
+        "changed_scale_blocks": 426623
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.282798767089844,
+        "squared_error": 27.301668167114258,
+        "changed_scale_blocks": 426089
+      },
+      "packed_byte_changes": 1672797,
+      "merged_bf16_changes": 9809067
+    },
+    {
+      "name": "backbone.layers.62.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.936456680297852,
+        "squared_error": 6.855668067932129,
+        "changed_scale_blocks": 101608
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 8.93877124786377,
+        "squared_error": 6.859035015106201,
+        "changed_scale_blocks": 101522
+      },
+      "packed_byte_changes": 268577,
+      "merged_bf16_changes": 2350186
+    },
+    {
+      "name": "backbone.layers.63.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.66661071777344,
+        "squared_error": 47.324851989746094,
+        "changed_scale_blocks": 777477
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.65339660644531,
+        "squared_error": 47.33160400390625,
+        "changed_scale_blocks": 777207
+      },
+      "packed_byte_changes": 1080302,
+      "merged_bf16_changes": 14626285
+    },
+    {
+      "name": "backbone.layers.63.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.74222564697266,
+        "squared_error": 47.34233856201172,
+        "changed_scale_blocks": 772366
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.81884765625,
+        "squared_error": 47.379581451416016,
+        "changed_scale_blocks": 772370
+      },
+      "packed_byte_changes": 2700684,
+      "merged_bf16_changes": 17026751
+    },
+    {
+      "name": "backbone.layers.63.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.71851348876953,
+        "squared_error": 47.361732482910156,
+        "changed_scale_blocks": 773616
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.75166320800781,
+        "squared_error": 47.382904052734375,
+        "changed_scale_blocks": 772941
+      },
+      "packed_byte_changes": 1879522,
+      "merged_bf16_changes": 16333213
+    },
+    {
+      "name": "backbone.layers.64.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.89783477783203,
+        "squared_error": 27.012939453125,
+        "changed_scale_blocks": 441107
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 37.01726531982422,
+        "squared_error": 27.09160614013672,
+        "changed_scale_blocks": 442087
+      },
+      "packed_byte_changes": 1957001,
+      "merged_bf16_changes": 9877931
+    },
+    {
+      "name": "backbone.layers.64.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.225997924804688,
+        "squared_error": 6.757835865020752,
+        "changed_scale_blocks": 110591
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.259174346923828,
+        "squared_error": 6.777194976806641,
+        "changed_scale_blocks": 110636
+      },
+      "packed_byte_changes": 524443,
+      "merged_bf16_changes": 2486117
+    },
+    {
+      "name": "backbone.layers.64.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.85458755493164,
+        "squared_error": 27.075895309448242,
+        "changed_scale_blocks": 439259
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.862632751464844,
+        "squared_error": 27.077322006225586,
+        "changed_scale_blocks": 439648
+      },
+      "packed_byte_changes": 789125,
+      "merged_bf16_changes": 8859145
+    },
+    {
+      "name": "backbone.layers.64.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.888145446777344,
+        "squared_error": 27.025264739990234,
+        "changed_scale_blocks": 443567
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.92539978027344,
+        "squared_error": 27.04962921142578,
+        "changed_scale_blocks": 443136
+      },
+      "packed_byte_changes": 1358395,
+      "merged_bf16_changes": 9603299
+    },
+    {
+      "name": "backbone.layers.64.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.22160530090332,
+        "squared_error": 6.760058403015137,
+        "changed_scale_blocks": 110416
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.240095138549805,
+        "squared_error": 6.780520439147949,
+        "changed_scale_blocks": 110186
+      },
+      "packed_byte_changes": 475732,
+      "merged_bf16_changes": 2463389
+    },
+    {
+      "name": "backbone.layers.65.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.75521850585938,
+        "squared_error": 47.4068603515625,
+        "changed_scale_blocks": 775460
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.76716613769531,
+        "squared_error": 47.416168212890625,
+        "changed_scale_blocks": 774950
+      },
+      "packed_byte_changes": 976856,
+      "merged_bf16_changes": 14192097
+    },
+    {
+      "name": "backbone.layers.65.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.71739196777344,
+        "squared_error": 47.3410758972168,
+        "changed_scale_blocks": 779835
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.7284927368164,
+        "squared_error": 47.353641510009766,
+        "changed_scale_blocks": 779090
+      },
+      "packed_byte_changes": 2192081,
+      "merged_bf16_changes": 16712752
+    },
+    {
+      "name": "backbone.layers.65.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.7364501953125,
+        "squared_error": 47.357749938964844,
+        "changed_scale_blocks": 774043
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.78224182128906,
+        "squared_error": 47.383445739746094,
+        "changed_scale_blocks": 773977
+      },
+      "packed_byte_changes": 1810229,
+      "merged_bf16_changes": 16255582
+    },
+    {
+      "name": "backbone.layers.66.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.895652770996094,
+        "squared_error": 27.023509979248047,
+        "changed_scale_blocks": 444629
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.93517303466797,
+        "squared_error": 27.05935287475586,
+        "changed_scale_blocks": 444520
+      },
+      "packed_byte_changes": 1592677,
+      "merged_bf16_changes": 9739382
+    },
+    {
+      "name": "backbone.layers.66.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.129745483398438,
+        "squared_error": 6.786417007446289,
+        "changed_scale_blocks": 108657
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.147880554199219,
+        "squared_error": 6.79976749420166,
+        "changed_scale_blocks": 108736
+      },
+      "packed_byte_changes": 459392,
+      "merged_bf16_changes": 2444359
+    },
+    {
+      "name": "backbone.layers.66.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.92998504638672,
+        "squared_error": 27.096656799316406,
+        "changed_scale_blocks": 440447
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.92471694946289,
+        "squared_error": 27.095623016357422,
+        "changed_scale_blocks": 440655
+      },
+      "packed_byte_changes": 647913,
+      "merged_bf16_changes": 8528876
+    },
+    {
+      "name": "backbone.layers.66.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.717308044433594,
+        "squared_error": 27.115650177001953,
+        "changed_scale_blocks": 436373
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.76991271972656,
+        "squared_error": 27.14719009399414,
+        "changed_scale_blocks": 435864
+      },
+      "packed_byte_changes": 1499361,
+      "merged_bf16_changes": 9709448
+    },
+    {
+      "name": "backbone.layers.66.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.17016315460205,
+        "squared_error": 6.782525062561035,
+        "changed_scale_blocks": 108612
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.172323226928711,
+        "squared_error": 6.785078048706055,
+        "changed_scale_blocks": 108642
+      },
+      "packed_byte_changes": 278687,
+      "merged_bf16_changes": 2346889
+    },
+    {
+      "name": "backbone.layers.67.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.6478500366211,
+        "squared_error": 47.39223861694336,
+        "changed_scale_blocks": 769833
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.66036987304688,
+        "squared_error": 47.40013885498047,
+        "changed_scale_blocks": 770059
+      },
+      "packed_byte_changes": 855022,
+      "merged_bf16_changes": 13695555
+    },
+    {
+      "name": "backbone.layers.67.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.65272521972656,
+        "squared_error": 47.333534240722656,
+        "changed_scale_blocks": 778389
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.67533874511719,
+        "squared_error": 47.35733413696289,
+        "changed_scale_blocks": 778060
+      },
+      "packed_byte_changes": 2012805,
+      "merged_bf16_changes": 16513009
+    },
+    {
+      "name": "backbone.layers.67.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.59417724609375,
+        "squared_error": 47.31169128417969,
+        "changed_scale_blocks": 777690
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.62214660644531,
+        "squared_error": 47.334068298339844,
+        "changed_scale_blocks": 777624
+      },
+      "packed_byte_changes": 1757108,
+      "merged_bf16_changes": 16188854
+    },
+    {
+      "name": "backbone.layers.68.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.86163330078125,
+        "squared_error": 27.03525161743164,
+        "changed_scale_blocks": 443890
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.892616271972656,
+        "squared_error": 27.058422088623047,
+        "changed_scale_blocks": 443714
+      },
+      "packed_byte_changes": 1321431,
+      "merged_bf16_changes": 9551101
+    },
+    {
+      "name": "backbone.layers.68.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.190608978271484,
+        "squared_error": 6.7662177085876465,
+        "changed_scale_blocks": 109851
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.210792541503906,
+        "squared_error": 6.778853416442871,
+        "changed_scale_blocks": 109724
+      },
+      "packed_byte_changes": 414456,
+      "merged_bf16_changes": 2425417
+    },
+    {
+      "name": "backbone.layers.68.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.79380798339844,
+        "squared_error": 27.11514663696289,
+        "changed_scale_blocks": 438471
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.80305099487305,
+        "squared_error": 27.115154266357422,
+        "changed_scale_blocks": 438572
+      },
+      "packed_byte_changes": 512903,
+      "merged_bf16_changes": 7989061
+    },
+    {
+      "name": "backbone.layers.68.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.88016891479492,
+        "squared_error": 27.09829330444336,
+        "changed_scale_blocks": 438973
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.89105987548828,
+        "squared_error": 27.115707397460938,
+        "changed_scale_blocks": 438969
+      },
+      "packed_byte_changes": 1311837,
+      "merged_bf16_changes": 9556506
+    },
+    {
+      "name": "backbone.layers.68.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.189908981323242,
+        "squared_error": 6.787233352661133,
+        "changed_scale_blocks": 108700
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.198338508605957,
+        "squared_error": 6.788807392120361,
+        "changed_scale_blocks": 108728
+      },
+      "packed_byte_changes": 226199,
+      "merged_bf16_changes": 2283354
+    },
+    {
+      "name": "backbone.layers.69.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.64434051513672,
+        "squared_error": 47.36891555786133,
+        "changed_scale_blocks": 770453
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.64288330078125,
+        "squared_error": 47.366695404052734,
+        "changed_scale_blocks": 770273
+      },
+      "packed_byte_changes": 515414,
+      "merged_bf16_changes": 11317731
+    },
+    {
+      "name": "backbone.layers.69.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.62332153320312,
+        "squared_error": 47.32560729980469,
+        "changed_scale_blocks": 777313
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.65489196777344,
+        "squared_error": 47.34916687011719,
+        "changed_scale_blocks": 777187
+      },
+      "packed_byte_changes": 1896721,
+      "merged_bf16_changes": 16296997
+    },
+    {
+      "name": "backbone.layers.69.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.65557861328125,
+        "squared_error": 47.30464172363281,
+        "changed_scale_blocks": 772629
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.67073059082031,
+        "squared_error": 47.318824768066406,
+        "changed_scale_blocks": 772460
+      },
+      "packed_byte_changes": 1637493,
+      "merged_bf16_changes": 15889873
+    },
+    {
+      "name": "backbone.layers.7.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.18142700195312,
+        "squared_error": 47.442543029785156,
+        "changed_scale_blocks": 761849
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.31427001953125,
+        "squared_error": 47.5344352722168,
+        "changed_scale_blocks": 761439
+      },
+      "packed_byte_changes": 3488680,
+      "merged_bf16_changes": 17458775
+    },
+    {
+      "name": "backbone.layers.7.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.24542236328125,
+        "squared_error": 47.366477966308594,
+        "changed_scale_blocks": 769479
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.39982604980469,
+        "squared_error": 47.49114227294922,
+        "changed_scale_blocks": 769602
+      },
+      "packed_byte_changes": 3932731,
+      "merged_bf16_changes": 17602167
+    },
+    {
+      "name": "backbone.layers.7.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.10650634765625,
+        "squared_error": 47.36436462402344,
+        "changed_scale_blocks": 761558
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.29986572265625,
+        "squared_error": 47.48699951171875,
+        "changed_scale_blocks": 762067
+      },
+      "packed_byte_changes": 3890307,
+      "merged_bf16_changes": 17599326
+    },
+    {
+      "name": "backbone.layers.70.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.88714599609375,
+        "squared_error": 27.035587310791016,
+        "changed_scale_blocks": 444177
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.899078369140625,
+        "squared_error": 27.051048278808594,
+        "changed_scale_blocks": 443781
+      },
+      "packed_byte_changes": 1198847,
+      "merged_bf16_changes": 9290100
+    },
+    {
+      "name": "backbone.layers.70.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.223716735839844,
+        "squared_error": 6.767487049102783,
+        "changed_scale_blocks": 109745
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.23514175415039,
+        "squared_error": 6.786311149597168,
+        "changed_scale_blocks": 109720
+      },
+      "packed_byte_changes": 507423,
+      "merged_bf16_changes": 2461079
+    },
+    {
+      "name": "backbone.layers.70.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.684844970703125,
+        "squared_error": 27.123226165771484,
+        "changed_scale_blocks": 436644
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.682308197021484,
+        "squared_error": 27.123428344726562,
+        "changed_scale_blocks": 436681
+      },
+      "packed_byte_changes": 354314,
+      "merged_bf16_changes": 7091616
+    },
+    {
+      "name": "backbone.layers.70.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.949729919433594,
+        "squared_error": 27.006649017333984,
+        "changed_scale_blocks": 442087
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 37.113651275634766,
+        "squared_error": 27.13768768310547,
+        "changed_scale_blocks": 441965
+      },
+      "packed_byte_changes": 2314184,
+      "merged_bf16_changes": 9726058
+    },
+    {
+      "name": "backbone.layers.70.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.17043685913086,
+        "squared_error": 6.7710347175598145,
+        "changed_scale_blocks": 109446
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.171856880187988,
+        "squared_error": 6.773630142211914,
+        "changed_scale_blocks": 109290
+      },
+      "packed_byte_changes": 246792,
+      "merged_bf16_changes": 2287855
+    },
+    {
+      "name": "backbone.layers.71.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.42701721191406,
+        "squared_error": 47.46422576904297,
+        "changed_scale_blocks": 767823
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.42674255371094,
+        "squared_error": 47.46379852294922,
+        "changed_scale_blocks": 767776
+      },
+      "packed_byte_changes": 131488,
+      "merged_bf16_changes": 5640653
+    },
+    {
+      "name": "backbone.layers.71.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.53834533691406,
+        "squared_error": 47.34141540527344,
+        "changed_scale_blocks": 776844
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.55842590332031,
+        "squared_error": 47.35210418701172,
+        "changed_scale_blocks": 776427
+      },
+      "packed_byte_changes": 1534318,
+      "merged_bf16_changes": 15575892
+    },
+    {
+      "name": "backbone.layers.71.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.63694763183594,
+        "squared_error": 47.33809280395508,
+        "changed_scale_blocks": 777483
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.64369201660156,
+        "squared_error": 47.33777618408203,
+        "changed_scale_blocks": 777355
+      },
+      "packed_byte_changes": 1192139,
+      "merged_bf16_changes": 14703530
+    },
+    {
+      "name": "backbone.layers.8.mixer.g_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.78464889526367,
+        "squared_error": 27.02900505065918,
+        "changed_scale_blocks": 440727
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.90562438964844,
+        "squared_error": 27.117496490478516,
+        "changed_scale_blocks": 441034
+      },
+      "packed_byte_changes": 2342141,
+      "merged_bf16_changes": 10064298
+    },
+    {
+      "name": "backbone.layers.8.mixer.k_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.128093719482422,
+        "squared_error": 6.783987045288086,
+        "changed_scale_blocks": 108205
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.159802436828613,
+        "squared_error": 6.802311897277832,
+        "changed_scale_blocks": 108663
+      },
+      "packed_byte_changes": 570316,
+      "merged_bf16_changes": 2514270
+    },
+    {
+      "name": "backbone.layers.8.mixer.o_proj.weight",
+      "shape": [
+        2560,
+        4096
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.659515380859375,
+        "squared_error": 27.08603286743164,
+        "changed_scale_blocks": 435105
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.72933578491211,
+        "squared_error": 27.172008514404297,
+        "changed_scale_blocks": 434036
+      },
+      "packed_byte_changes": 2269267,
+      "merged_bf16_changes": 10010651
+    },
+    {
+      "name": "backbone.layers.8.mixer.q_proj.weight",
+      "shape": [
+        4096,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.6406364440918,
+        "squared_error": 27.099891662597656,
+        "changed_scale_blocks": 436705
+      },
+      "nvfp4-merged": {
+        "elements": 10485760,
+        "blocks": 655360,
+        "maxabs_squared_error": 36.770233154296875,
+        "squared_error": 27.1936092376709,
+        "changed_scale_blocks": 436792
+      },
+      "packed_byte_changes": 2289915,
+      "merged_bf16_changes": 10038432
+    },
+    {
+      "name": "backbone.layers.8.mixer.v_proj.weight",
+      "shape": [
+        1024,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.105602264404297,
+        "squared_error": 6.774622917175293,
+        "changed_scale_blocks": 106932
+      },
+      "nvfp4-merged": {
+        "elements": 2621440,
+        "blocks": 163840,
+        "maxabs_squared_error": 9.131813049316406,
+        "squared_error": 6.798840522766113,
+        "changed_scale_blocks": 106801
+      },
+      "packed_byte_changes": 580913,
+      "merged_bf16_changes": 2504276
+    },
+    {
+      "name": "backbone.layers.9.mixer.down_proj.weight",
+      "shape": [
+        2560,
+        7168
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 63.9753532409668,
+        "squared_error": 47.43384552001953,
+        "changed_scale_blocks": 761512
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.10872650146484,
+        "squared_error": 47.51343536376953,
+        "changed_scale_blocks": 762177
+      },
+      "packed_byte_changes": 3425456,
+      "merged_bf16_changes": 17438778
+    },
+    {
+      "name": "backbone.layers.9.mixer.gate_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.30510711669922,
+        "squared_error": 47.324317932128906,
+        "changed_scale_blocks": 769008
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.4754409790039,
+        "squared_error": 47.46645736694336,
+        "changed_scale_blocks": 769126
+      },
+      "packed_byte_changes": 3955980,
+      "merged_bf16_changes": 17622964
+    },
+    {
+      "name": "backbone.layers.9.mixer.up_proj.weight",
+      "shape": [
+        7168,
+        2560
+      ],
+      "nvfp4-base": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.286376953125,
+        "squared_error": 47.36985778808594,
+        "changed_scale_blocks": 767617
+      },
+      "nvfp4-merged": {
+        "elements": 18350080,
+        "blocks": 1146880,
+        "maxabs_squared_error": 64.46890258789062,
+        "squared_error": 47.50370788574219,
+        "changed_scale_blocks": 767988
+      },
+      "packed_byte_changes": 3777949,
+      "merged_bf16_changes": 17567517
+    }
+  ],
+  "elapsed_s": 52.77437930973247
+}