⚠️ STOCK llama.cpp WILL NOT LOAD THIS MODEL

⚠️ -fa off is required β€” flash attention breaks the vision path on gfx1151.

πŸš€ 24.62 tok/s β€” +9.4% faster and 0.5 GiB smaller than Q4_K_M, ranges disjoint.

Phi-4-Reasoning-Vision-15B β€” ROCmFP4 (tier 102 COHERENT) GGUF

A 4-bit ROCmFP4 quantization for AMD gfx1151 (Ryzen AI MAX+ 395 / Strix Halo), quantized from F16 GGUF (27.96 GiB) β€” a lossless source, not a requantization of a lower-bit build.

File Phi-4-reasoning-vision-15B-Q4_0_ROCMFP4_COHERENT.gguf
Size 8.0 GiB
BPW 4.65
ftype Q4_0_ROCMFP4_COHERENT (102)

β›” Requires a llama.cpp with the ROCmFP4 quant types

Q4_0_ROCMFP4_COHERENT (ftype 102) exists only in charlie12345/ROCmFPX, not upstream llama.cpp. Ignore the auto-generated "Use this model" commands above.


All quant variants

Three builds, all measured in one session on one box with one binary (Ryzen AI MAX+ 395, gfx1151, ROCm 7.2.4, ROCmFPX-2809dc5, -fa off) β€” so these rows are directly comparable. Median of 3, warm-up discarded, otherwise-idle box.

variant ftype size bpw decode (median) range repo
4-bit COHERENT 102 7.93 GiB 4.65 24.91 24.88 – 24.91 link
8-bit AGENT 115 14.34 GiB 8.40 14.08 14.06 – 14.09 link
8-bit plain 111 14.11 GiB 8.27 14.15 14.13 – 14.20 link

⚠️ The 4-bit build is ~1.7Γ— faster and 43% smaller. The 8-bit builds exist for accuracy headroom, not throughput. The two 8-bit builds are within noise of each other (14.08 vs 14.15, ranges touching) β€” this model has no MTP draft head, and AGENT's benefit shows up in draft acceptance, so there is nothing here for it to win.

⚠️ -fa off is mandatory β€” flash attention breaks the vision path on gfx1151. The BF16 mmproj (862 MiB) ships in every one of these repos and is required for vision.

Measured

Ryzen AI MAX+ 395 (gfx1151, 128 GB unified, ROCm 7.2.4). Median of 3+, warm-up discarded, otherwise-idle box. Correctness at the model's official sampling.

build size decode (median) range
this build 8.0 GiB 24.62 [23.42 – 25.37]
Q4_K_M 8.5 GiB 22.50 [22.25 – 22.50]

+9.4%, ranges disjoint. Vision verified: an 8Γ—8 red PNG is correctly described as Red.

Correctness: 17Γ—23 β‡’ βœ… 391 Β· capital of Japan β‡’ βœ… Tokyo Β· days in 2024 β‡’ βœ… 366

Per-tensor types (audited in the finished file)

output.weight Q6_K Β· token_embd Q6_K Β· norms F32 Β· bulk TYPE_100 (160) Β· vision tower kept at BF16 (mmproj, 823 MiB β€” included)

Serve with -fa off and the bundled BF16 mmproj.


What was NOT measured

  • No perplexity run, and no quality A/B against the baseline or the source. The checks above are memorized-fact prompts β€” necessary but not sufficient; a damaged model can pass them.
  • No long-context testing.
  • No tool-calling evaluation.

Base model licence inherited; credit for the model goes to its authors.

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