This repository contains third-party ComfyUI compatibility conversions of the original MiniMax-H3 Turbo LoRA — 4-step audio-video generation preview created by larryvrh.
It also includes two further-trained checkpoint-500 variants in the same pruned-model ComfyUI format.
These LoRAs are intended for the pruned/curve-form MiniMax-H3 checkpoint used by ComfyUI.
The original LoRA weights, training work, four-step distillation method, dual video/audio sampling implementation, documentation and source files were created and released by larryvrh:
I did not train, distill or create the original Turbo LoRA weights. This repository provides modified compatibility versions intended to allow the compatible LoRA adapters to load with ComfyUI's built-in MiniMax-H3 LoRA loader when using the pruned/curve-form model.
Full credit for the original MiniMax-H3 Turbo LoRA and its distillation method belongs to larryvrh.
Included Files
File
Description
minimax_h3_turbo_4step_pruned_comfyui.safetensors
Initial partial ComfyUI compatibility conversion of the original non-EMA Turbo weights for the pruned/curve-form MiniMax-H3 checkpoint. The original author describes the non-EMA weights as crisper and better at holding fast motion.
Initial partial ComfyUI compatibility conversion of the original EMA Turbo weights for the pruned/curve-form MiniMax-H3 checkpoint. The original author describes the early EMA weights as smoother but softer because the EMA had not fully matured.
Further-trained checkpoint-500 EMA variant in the pruned-model ComfyUI format. This contains the time-averaged weights from the further-trained checkpoint.
fl_minimax_h3_turbo_lora_example_workflow.json
First-and-last-frame ComfyUI example workflow using the Turbo LoRA, with optional attention and memory optimizations.
The EMA and non-EMA files remain separate and contain different tensor values.
The original converted files preserve the initial preview weights, while the ckpt500 files provide the further-trained variants.
These are partial compatibility versions of the original full-model Turbo LoRAs for use with the pruned/curve-form MiniMax-H3 architecture.
The non-EMA variants generally preserve a sharper response and stronger fast-motion behavior, while the EMA variants are intended to provide smoother time-averaged weights.
About the Original Turbo LoRA
The original MiniMax-H3 Turbo LoRA is an early preview checkpoint designed to generate joint video and synchronized stereo audio in approximately 4 sampling steps instead of the usual approximately 20 steps, providing roughly a 5× reduction in sampling wall-clock time.
The original author clearly states that the initial release is an unfinished preview checkpoint from an in-progress training run:
it is under-trained;
the initial EMA weights have not fully matured;
quality is not representative of a completed run;
it is intended as an early demonstration of the direction of the project.
The additional ckpt500 files in this repository are further-trained variants beyond that initial preview checkpoint.
Refer to the original repository for the original author's documentation, generation script, scheduler implementation and future updates:
A higher LoRA strength can generally be used with fewer sampling steps
Use the same prompt, seed, resolution, model checkpoint, sampler and workflow when comparing files
Optional accelerators confirmed working:
SageAttention
Sol Attention
Gradient
Spectrum
Do not assume broken audio is caused by the LoRA before checking the sampler, scheduler and audio sigma-shift configuration.
Audio and Scheduler Notes
MiniMax-H3 generates video and synchronized audio as separate streams with different scheduling requirements.
The original author's standalone generation implementation uses a dual video/audio scheduling system specifically designed for ultra-low-step generation.
For this ComfyUI pruned-model version, the tested settings are:
Video sigma shift: 12
Audio sigma shift: 4-6
Steps: 8–10 / 6-8 (ckpt500)
Sampler: res_multistep
Incorrect audio scheduling may result in:
blown-out audio;
severe distortion;
noise-like audio;
unstable audio energy;
completely broken audio.
For the original full-model settings, model files, resolution guidance, frame-count rules and dual-scheduler implementation, follow the original README:
This repository contains third-party, partial ComfyUI compatibility versions for the pruned/curve-form MiniMax-H3 checkpoint, including further-trained checkpoint-500 variants.
I do not claim authorship of:
the original Turbo LoRA weights;
the original LoRA training;
the original distillation method;
the original four-step sampling method;
the original dual video/audio scheduler;
the original generate.py;
the original documentation;
the MiniMax-H3 base model;
the pruned/curve-form MiniMax-H3 checkpoint.
Please retain attribution to larryvrh and comply with the licences and terms of the original LoRA and MiniMax-H3 base model when using or redistributing these files.
