Model reference · open weights
minimax-h3 is an open-weight video model from rockerBOO, listed in the AxForge catalogue. AxForge can bring it up on EU-owned hardware for you on request — with the licence handled where one is required.
About
MiniMax H3 — NVFP4 + FP8 (fl2va) A single ComfyUI checkpoint for MiniMax H3: NVFP4 for the bulk MLP weights, FP8 (tensor-scale) for attn.qkvproj, AdaLN modulation pruned to a lookup table. fl2va (first/last-frame) mode only. Requires a Blackwell GPU (RTX 50-series, B100/B200). attn.qkvproj 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.qkvproj 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.
Summarised from the published model card. Read the full card on the HuggingFace links below.
Specifications
| Maker | rockerBOO |
|---|---|
| Type | Video models |
| Variants | 1 |
| Runs with | minimax-h3 |
| Based on | MiniMaxAI/MiniMax-H3 |
| Released | 2026-08-21 |
| Popularity | 32k downloads / month |
| Licence | Commercial licence needed |
How it works
Variants
Open weights ship in several sizes and precisions. One page, all the variants — pick the one that fits your GPU. VRAM figures are estimates from model size.
| Variant | Params | Precision | VRAM | Fits 16 GB | Weights |
|---|---|---|---|---|---|
| minimax-h3-nvfp4-fp8 | — | NVFP4 | — | — | Weights ↗ |
Using it via the API
Once AxForge deploys rockerboo-minimax-h3 for you, it answers on the OpenAI-compatible API — the same base URL and keys as every other model. (rockerboo-minimax-h3 below is illustrative; you get the exact model name on deployment.)
$ curl -sS https://api.axforge.ai/v1/videos/generations \
-H "Authorization: Bearer $AXFORGE_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"rockerboo-minimax-h3","prompt":"a drone shot over a forest"}'
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Licence
The weights are open but its licence needs a commercial agreement for business use. AxForge can arrange that licence and host the model for you — you pay AxForge, we settle with the model’s maker. Ask us for a quote. Read the licence ↗
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