SPEED V2: Retraining-Free MiniMax-H3 Speedup Adds 5 Samplers and Fixes a Degradation Bug
antipode_insights · reddit · 2026-09-20
The author released ComfyUI-MiniMax-H3-SPEED V2, a retraining-free speedup for MiniMax-H3 video generation that runs early diffusion steps at lower resolution and progressively returns to full res. Repo: https://github.com/StanLukuvka/ComfyUI-MiniMax-H3-SPEED
Key V2 changes:
- Fixed a fundamental bug that made the node degrade much faster than it should
- Added sampler support: Euler, Heun, DPM2, Exp Heun 2 X0, RES Multistep
- Extensive code cleanup, bug fixes, validation and test refactors
- Improvements to I2V handling, Sigma Harvest, sampler state, stage planning, and failure cleanup
Overall more consistent output with less artifacting and blurring — a practical speedup tool for ComfyUI video workflows.
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