MiniMax H3 — NVFP4 + FP8 (fl2va)
A single ComfyUI checkpoint for MiniMax H3: NVFP4 for
the bulk MLP weights, FP8 (tensor-scale) for attn.qkv_proj, AdaLN modulation pruned to a lookup
table. fl2va (first/last-frame) mode only. Requires a Blackwell GPU (RTX 50-series, B100/B200).
| File | Size | What it is |
|---|---|---|
minimax_h3_fl2va_pruned_nvfp4_fp8.safetensors |
20 GB | NVFP4 MLP + FP8 attn.qkv_proj, AdaLN-pruned |
attn.qkv_proj is quantized fresh from the original BF16 weights (default ctq FP8 output) and
spliced into the NVFP4 base. Tested and confirmed working in ComfyUI.
Looking for other variants?
See rockerBOO/minimax-h3-nvfp4-convrot
for the full set — ref2va support, the recommended INT8 ConvRot attn.qkv_proj variant (same
size, faster), the unpruned base, experimental INT4 ConvRot variants, and full quantization-method
documentation. This file is the FP8 speed-comparison baseline for that repo's ConvRot INT8 variant.
License
MiniMax H3 Community License Agreement, inherited from MiniMaxAI/MiniMax-H3 (repackaged by Comfy-Org/MiniMax-H3).
MiniMax H3 is licensed under the MiniMax H3 Community License Agreement, Copyright © 2026 MiniMax. All Rights Reserved.
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Model tree for rockerBOO/minimax-h3-nvfp4-fp8
Base model
MiniMaxAI/MiniMax-H3