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MiniMax-H3-Workflows

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MiniMax H3 — ComfyUI Workflows

Drag-and-drop ComfyUI workflows for MiniMax H3, the omni-modal video model that generates video with native stereo audio (voice, SFX, room tone — all in one pass). Shared by @BennyDaBall_OG.

Workflows

File	What it does
`MiniMax_H3_Turbo_v4_8step_T2VA_BennyDaBall.json`	Text → video+audio with the Turbo v4 LoRA — 8 steps instead of 20, ~1.9× faster, audio stays clean

Turbo v4 · 8-step T2VA

100% core ComfyUI nodes — no custom node packs. Verified with a same-seed A/B against the stock 20-step recipe: same choreography, healthy audio (peak ≈ −9 dB, zero clipping).

The recipe

Setting	Value
LoRA	`minimax_h3_turbo_v4_step600_ema_pruned_comfyui` @ 1.0 (built-in LoraLoaderModelOnly)
Steps / sampler / scheduler	8 · euler · beta (no sigma-shift node needed)
Guidance	CFG-free (BasicGuider) — write a `Negative:` line inside the prompt itself
Resolution	1344×768 @ 24 fps
Length	frames on a 17k+5 grid: 124 ≈ 5 s, 243 ≈ 10 s, 362 ≈ 15 s (model max)

The bundled demo prompt ships with a fixed seed so your first render reproduces the demo clip — flip the seed widget to randomize for new takes.

Getting started

Update ComfyUI to ≥ 0.30 (MiniMax H3 nodes are built in).
Drag the .json onto the ComfyUI canvas.
ComfyUI will offer to download any missing models automatically (every loader node carries its download URL). Manual links below.
Queue. First run: the console should show zero lora key not loaded warnings.

Models

File	Size	Folder
`minimax_h3_fl2va_pruned_int8_convrot.safetensors`	19.5 GB	`models/diffusion_models`
`qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors`	14.6 GB	`models/text_encoders`
`minimax_h3_video_vae_fp16.safetensors`	1.4 GB	`models/vae`
`minimax_h3_audio_vae_fp32.safetensors`	0.4 GB	`models/vae`
`minimax_h3_turbo_v4_step600_ema_pruned_comfyui.safetensors`	620 MB	`models/loras`

Tested / not tested

Verified on 5-second clips at 1344×768. Higher res (1920×1088) and longer clips are untested with this LoRA — earlier turbo versions fell apart there, so treat that as experimental.
Few-step audio blowout is the classic turbo failure mode; this v4 @ 8 steps is the combo that passed. If you drop steps further, check your audio peaks.

Prompt pattern that works

Style contract → timed beats (0.0-0.6s: ...) → camera lock line → an audio timeline starting with room tone at 0.0s → Negative: line. Dialogue inside <d>[English] ... </d> is spoken verbatim with lip-sync. Give the first spoken line ≥ 1.2 s of lead-in and anchor t=0 with room tone. The demo prompt in the workflow shows the full pattern.

Credits

MiniMax H3 by MiniMax · ComfyUI-repackaged weights by Comfy-Org
Turbo LoRA trained by larryvrh (v4_step600 EMA) · ComfyUI convert by drbaph
Workflow + testing by @BennyDaBall_OG

License note: this repo covers the workflow files only. The H3 model weights and the LoRA carry their own licenses — check the linked repos before commercial use.

BennyDaBall/MiniMax-H3-Workflows