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MiniMax H3 is MiniMax’s open-weights omni-modal model. It understands text, images, video, and audio in one context and generates video with native stereo audio (voice, SFX, and music in a single pass). Open weights target about 1 megapixel (768px short edge) at 24fps for up to ~15 seconds. 2K is a hosted-service output and needs a separate upscale pass in ComfyUI.
H3’s open weights let you run the model locally. Commercial use of locally generated outputs requires a MiniMax commercial license, available through Comfy, the only official reseller. Generations on Comfy Cloud already include commercial rights.

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Key features

  • Native stereo audio: Dialogue, SFX, and music in one MP4
  • Multimodal context: Combine text, image, video, and audio references
  • Reference-driven generation: Lock identity, style, motion, camera, or voice from references
  • Instruction following: Describe reference-to-shot relationships in natural language
  • Accurate text rendering: Clean spelled-out text and brand elements
  • Open weights: Full local control in ComfyUI

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Choosing a template Workflow

Pick a Workflow from Template Library > Video and download models from the pop-up. Weights: Comfy-Org/MiniMax-H3. Five video_minimax_h3_* template Workflows are available (examples, not an exhaustive list): t2v, i2v, r2v, multiframe_reference, and fun_controlnet_union.

Text to Video (T2V)

Generate videos from text prompts with native stereo audio. ComfyUI 0.30.0+.

Image to Video (I2V)

Generate videos from an input image, with optional first/last-frame control. ComfyUI 0.30.0+.

Reference to Video (R2V)

Lock in a character, style, motion, camera move, or voice from reference images, videos, and audio. ComfyUI 0.30.0+.

Multiframe Reference

Anchor reference frames at specific points along the output timeline with chained Add Guide Nodes. ComfyUI 0.34.0+.

Fun ControlNet Union

Drive H3 with a Canny, Depth, HED, MLSD, or Pose control video, or run video inpainting with a mask. ComfyUI 0.35.0+ (Union 2.0: 0.38.0+). Sparse attention and Model Attention Backend also need 0.35.0+.

Prompt guide

Official prompt guides, tips, and embeddings for H3

FastH3

FastVideo sparse-attention checkpoints and speed-focused Workflows. ComfyUI 0.36.0+.
Two templates cover several modes:
  • MiniMax H3 Image to Video covers T2V and first/last-frame I2V (t2va / fl2va).
  • MiniMax H3 Reference to Video covers R2V (ref2va).

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Commercial licensing

Commercial use of locally generated outputs requires a license from Comfy. Comfy Cloud generations already include commercial rights.

MiniMax commercial license

When you need a license, community vs Professional and Enterprise tiers, and how to request a quote.