| { |
| "name": "FastH3 NVFP4 VAE decoder (fast-8L)", |
| "format": "fastvideo_h3_decoder_nvfp4_deploy_v1", |
| "architecture": "MiniMaxH3VideoViTDecoder3d", |
| "decoder_blocks": 8, |
| "hidden_size": 2048, |
| "nvfp4": { |
| "scheme": "W4A4 NVFP4 (E2M1 values, E4M3 per-16 block scales, FP32 per-tensor scale)", |
| "block_size": 16, |
| "activation_global_scale": "unit", |
| "rotation_group": null, |
| "quantized_linears": 48, |
| "quantized_layers": "transformer_blocks.*.{attn.to_q,attn.to_k,attn.to_v,attn.to_out.0,ff.net.0.proj,ff.net.2}", |
| "high_precision": "proj_in, proj_out, norms, register tokens, post_quant_conv" |
| }, |
| "compute_dtype": "bfloat16 autocast", |
| "host_vae": "any MiniMax-H3 video VAE with >= 8 decoder blocks (e.g. the 26-block light VAE of the FastH3 V2/Trim stacks); the loader keeps 8", |
| "tensor_count_by_dtype": { |
| "float32": 89, |
| "bfloat16": 96 |
| }, |
| "nvfp4_linear_parameters": 537083904, |
| "source_step": 5000, |
| "files": { |
| "decoder.safetensors": { |
| "format": "fastvideo_h3_decoder_nvfp4_deploy_v1", |
| "contents": "NVFP4 linears as bf16 master weights, packed to NVFP4 at load; other tensors in their trained dtype", |
| "bytes": 1099886160, |
| "use": "reference weights, re-quantization, further training" |
| }, |
| "decoder-nvfp4.safetensors": { |
| "format": "fastvideo_h3_decoder_nvfp4_packed_v1", |
| "contents": "pre-packed NVFP4: per linear packed_weight (uint8, two E2M1 codes per byte), weight_inv_scale (E4M3 per-16 block scales, FlashInfer SfLayout.layout_128x4 swizzle), weight_global_sf (fp32), bias (bf16), input_amax (fp32); other tensors in their trained dtype (fp32)", |
| "bytes": 328147232, |
| "use": "smallest download and lowest load memory; Blackwell only; decodes bit-identically to decoder.safetensors" |
| } |
| } |
| } |
|
|
