# What do you need to run MiniMax H3 locally in ComfyUI (versions, checkpoint sizes) and what is the commercial-use route?

- id: art_01M5MBVWF1R7T3E45KYJ66CGCJ
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T06, T08, T09 · tags: none
- updated: 2026-10-23T12:30:41.114Z
- url: https://veyrul.com/articles/art_01M5MBVWF1R7T3E45KYJ66CGCJ

ComfyUI docs (captured 2026-10-23): H3 templates need ComfyUI 0.30.0+ for base T2V/I2V/R2V, 0.34.0+ multiframe reference, 0.35.0+ Fun ControlNet Union/sparse attention/Model Attention Backend, 0.36.0+ FastH3; weights (tens of GB) at Comfy-Org/MiniMax-H3. Pick the smallest build that fits VRAM: pruned_w6a8 16 GB (INT8 path, ComfyUI 0.38.0+), pruned_int8_convrot 21 GB (template default), pruned_fp8_scaled 21 GB, pruned_bf16 40 GB, full bf16 66 GB; LoRAs must match the build family (full-build LoRAs lose adaln on pruned); the "Comfy Kitchen" attention backend cannot run int8_convrot. Commercial use: "Commercial use of locally generated outputs requires a MiniMax commercial license", sold through Comfy ("the only official reseller"), while Comfy Cloud generations already include commercial rights. Read together with the licence text (C3-B364-01: territory excludes EU/UK/Korea/US; >$20M revenue needs authorization) - local open-weight use is not a free commercial path. Comfy's MCP page a...

ComfyUI docs (captured 2026-10-23): H3 templates need ComfyUI 0.30.0+ for base T2V/I2V/R2V, 0.34.0+ multiframe reference, 0.35.0+ Fun ControlNet Union/sparse attention/Model Attention Backend, 0.36.0+ FastH3; weights (tens of GB) at Comfy-Org/MiniMax-H3. Pick the smallest build that fits VRAM: pruned_w6a8 16 GB (INT8 path, ComfyUI 0.38.0+), pruned_int8_convrot 21 GB (template default), pruned_fp8_scaled 21 GB, pruned_bf16 40 GB, full bf16 66 GB; LoRAs must match the build family (full-build LoRAs lose adaln on pruned); the "Comfy Kitchen" attention backend cannot run int8_convrot. Commercial use: "Commercial use of locally generated outputs requires a MiniMax commercial license", sold through Comfy ("the only official reseller"), while Comfy Cloud generations already include commercial rights. Read together with the licence text (C3-B364-01: territory excludes EU/UK/Korea/US; >$20M revenue needs authorization) - local open-weight use is not a free commercial path. Comfy's MCP page also advises Mac users to use Cloud for large open models like H3 and LTX-2.3.

Curator qualifications: Some cited evidence could not be re-located by curator GET (see mechanical_checks); no video sources. Checkpoint size table re-located by curator (excerpt used an ellipsis).

Limitations: Checkpoint size is file size, not exact VRAM need; Comfy-reseller licence price not read.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://docs.comfy.org/tutorials/video/minimax/minimax-h3.md",
      "note": "Getting started item 1; Choosing the checkpoint precision table; NOTE at top"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] ComfyUI docs (captured 2026-10-23): H3 templates need ComfyUI 0.30.0+ for base T2V/I2V/R2V, 0.34.0+ multiframe reference, 0.35.0+ Fun ControlNet Union/sparse attention/Model Attention Backend, 0.36.0+ FastH3; weights (tens of GB) at Comfy-Org/MiniMax-H3. Pick the smallest build that fits VRAM: pruned_w6a8 16 GB (INT8 path, ComfyUI 0.38.0+), pruned_int8_convrot 21 GB (template default), pruned_fp8_scaled 21 GB, pruned_bf16 40 GB, full bf16 66 GB; LoRAs must match the build family (full-build LoRAs lose adaln on pruned); the "Comfy Kitchen" attention backend cannot run int8_convrot. Commercial use: "Commercial use of locally generated outputs requires a MiniMax commercial license", sold through Comfy ("the only official reseller"), while Comfy Cloud generations already include commercial rights. Read together with the licence text (C3-B364-01: territory excludes EU/UK/Korea/US; >$20M revenue needs authorization) - local open-weight use is not a free commercial path. Comfy's MCP page also advises Mac users to use Cloud for large open models like H3 and LTX-2.3. · locator: Getting started item 1; Choosing the checkpoint precision table; NOTE at top · source: https://docs.comfy.org/tutorials/video/minimax/minimax-h3.md

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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