minimax-h3-video

Builds local MiniMax H3 video workflows in ComfyUI with INT8 weights and turbo LoRAs.

715|111|Updated Feb 15, 2026
One-click install
npx skills add https://github.com/artokun/comfyui-mcp --skill minimax-h3-video
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: minimax-h3-video
Source: https://github.com/artokun/comfyui-mcp/tree/main/plugin/skills/minimax-h3-video
Command: npx skills add https://github.com/artokun/comfyui-mcp --skill minimax-h3-video

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Setting up MiniMax H3 (Hailuo) video generation locally in ComfyUI involves confusing choices between local-weight nodes and paid API nodes, multiple model files, turbo LoRAs, and nonstandard frame math, and mistakes produce broken graphs or wasted API credits.

Core Features & Use Cases

  • Local vs API path selection: Distinguishes the free local-weight nodes (MiniMaxH3ImageToVideo, MiniMaxH3ReferenceToVideo) from the paid partner API nodes so the right cost model is used.
  • Model and template setup: Lists the Comfy-Org INT8 diffusion models, Qwen3-VL text encoder, dual VAEs, and 4/8-step turbo LoRAs, plus how to load the official Template Library graphs.
  • Output and chaining guidance: Specifies 24 fps, 17k+5 frame-length math, 768px sizing, VRAM tiers down to 8 GB, and last-frame chaining for clips longer than 15 seconds.
  • Use Case: A user on a 12 GB GPU asks for a 10-second stereo-audio clip from a text prompt; the skill loads the T2V template, enables the turbo LoRA and Sage attention, sets the correct length, and queues the render.

Quick Start

Ask the agent to build a local MiniMax H3 text-to-video workflow in ComfyUI using the Comfy-Org INT8 template and turbo LoRA for a short clip with audio.

Frequently Asked Questions about minimax-h3-video

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run MiniMax H3 video generation locally in ComfyUI?▼

Load the MiniMax H3 template from the ComfyUI Template Library under Video, then download the Comfy-Org INT8 diffusion model, Qwen3-VL text encoder, and both VAEs from Hugging Face. The MiniMaxH3ImageToVideo node handles T2V, I2V, and first-last-frame modes.

What is the difference between MiniMax H3 local nodes and Hailuo API nodes?▼

Local nodes (MiniMaxH3ImageToVideo, MiniMaxH3ReferenceToVideo) run downloaded weights on your GPU for free, while API nodes (MinimaxHailuo03TextToVideoNode and similar) charge per generation through a MiniMax API key. The two paths must not be mixed in one graph.

Can MiniMax H3 run on an 8 GB VRAM GPU?▼

Yes, using the INT8 weights combined with a 4 or 8-step turbo LoRA, Sage attention patching, and reduced preview resolution around 0.2-0.4 megapixels. Renders take minutes per clip, and Kijai W4A8 weights are a fallback if INT8 still runs out of memory.

Why does my MiniMax H3 graph fail to load or produce garbage output?▼

Common causes are setting CLIPLoader type to something other than minimax, loading the fl2va UNet into an R2V graph (R2V requires the ref2va model), or running 4 steps without the turbo LoRA enabled. ComfyUI 0.30.0 or newer is required for the native nodes.

How do I make videos longer than 15 seconds with MiniMax H3?▼

A single H3 shot caps at about 15 seconds, so longer pieces are chained clips. Generate each clip, stage its last frame with upload_image, feed it as the first_frame of the next clip, then concatenate the results with ffmpeg.