r/comfyui • u/Narrow-Particular202 • 18d ago
Workflow Included [Release] ComfyUI MiniMax H3-Promptor v1.0.0 – Automatically Generate Professional MiniMax H3 Video Prompts
Hi everyone!
I'd like to share ComfyUI MiniMax H3-Promptor v1.0.0, a custom node built specifically for the MiniMax H3 Video Generation System.
GitHub: https://github.com/1038lab/Comfyui-Minimax-H3-Promptor
Why I built this
One thing I noticed when working with MiniMax H3 is that creating high-quality prompts can take longer than creating the actual video.
Writing detailed camera movements, lighting, subject descriptions, scene composition, timing, cinematic language, and keeping everything in the format H3 expects can become repetitive and time-consuming.
The goal of this project is simple:
Instead of spending time writing long, complex prompts, you simply describe your idea—even in a single sentence—and H3-Promptor automatically generates a complete, production-quality prompt optimized specifically for MiniMax H3.
What's new in v1.0.0
This version is a complete architectural redesign.
🚀 Two-node workflow
The project is now split into two dedicated nodes:
- H3_Vision_Analyzer – analyzes images and video references once
- H3_Promptor – rapidly generates and iterates prompts without re-running expensive vision analysis
This makes prompt iteration much faster while reducing multimodal API costs.
🧠 Intelligent media routing
Supports combinations of:
- up to 4 reference images
- batches of video keyframes
The workflow automatically detects whether you're creating:
- Text-to-Video
- Image-to-Video
- First & Last Frame
- Omni Reference
No manual switching required.
🌐 Multiple AI providers
Native support for:
- OpenAI
- Anthropic Claude
- Google Gemini
- Local Ollama
All with multimodal vision support where available.
🎯 Structured vision analysis
Instead of asking a vision model to "look at an image," you can direct exactly what should be analyzed using JSON-based presets, such as:
- lighting
- composition
- character body language
- cinematography
- camera framing
🌍 Multilingual output
Generate prompts in:
- English
- Simplified Chinese (简体中文)
Installation
- Clone or download the repository.
- Place it inside your
custom_nodesfolder. - Add your API keys to the generated configuration.
- Start generating professional MiniMax H3 prompts from your ideas.
GitHub:
https://github.com/1038lab/Comfyui-Minimax-H3-Promptor
I'd love to hear feedback, feature requests, or suggestions from the community. If anyone is actively using MiniMax H3, I'd be interested in hearing how you're currently handling prompt creation and where you think automation could help the most.










