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[PR #593] feat: Add ModelsLab image generation pipeline #478

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opened 2026-10-18 21:06:29 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-10-18 21:06:29 +00:00

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📋 Pull Request Information

Original PR: https://github.com/open-webui/pipelines/pull/593
Author: @adhikjoshi
Created: 2/18/2026
Status: 🔄 Open

Base: main ← Head: feat/add-modelslab-pipeline

📝 Commits (1)

5e5b335 feat: Add ModelsLab manifold pipeline

📊 Changes

1 file changed (+443 additions, -0 deletions)

View changed files

➕ examples/pipelines/providers/modelslab_manifold_pipeline.py (+443 -0)

📄 Description

🎨 ModelsLab Image Generation Pipeline for Open WebUI

Professional AI image generation with 13+ cutting-edge models integrated into Open WebUI's Pipelines framework.

Transform your Open WebUI experience with ModelsLab's powerful image generation capabilities, featuring Flux, SDXL, Playground v2.5, and many more state-of-the-art models through OpenAI-compatible API format.

✨ Features

13+ AI Models: Flux, SDXL, Playground v2.5, Stable Diffusion, and more
OpenAI API Compatible: Seamless integration with Open WebUI's image generation system
Competitive Pricing: $0.008-$0.018 per image (vs $0.020-$0.080 for DALL-E)
Professional Quality: Latest SOTA models for stunning results
Async Processing: Handles long-running generations with progress tracking
Cost Transparency: Clear pricing display for each model
Safety Features: Content filtering and prompt enhancement
Easy Configuration: Admin panel valve settings

🚀 Quick Start

Prerequisites

Open WebUI with Pipelines support
ModelsLab API key (Get one free)
Docker (recommended) or Python 3.8+

Installation

Method 1: Direct Upload (Recommended)

Download the pipeline file:
- Save modelslab_image_pipeline.py to your computer
Upload via Admin Panel:
- Go to Admin Panel > Settings > Pipelines
- Click "+" to add a new pipeline
- Upload the modelslab_image_pipeline.py file
- Pipeline will be automatically loaded
Configure the pipeline:
- Set your MODELSLAB_API_KEY in the pipeline valves
- Adjust other settings as needed (default values work well)
Add as connection (if needed):
- Go to Admin Panel > Settings > Connections
- Add Pipelines URL as OpenAI connection if not already connected

Method 2: Via Pipelines Docker Container

Run Pipelines container with ModelsLab pipeline:

docker run -d -p 9099:9099 \
  --add-host=host.docker.internal:host-gateway \
  -e PIPELINES_URLS="https://raw.githubusercontent.com/your-repo/modelslab_image_pipeline.py" \
  -v pipelines:/app/pipelines \
  --name pipelines --restart always \
  ghcr.io/open-webui/pipelines:main

Connect to Open WebUI:
- Go to Admin Panel > Settings > Connections
- Add connection: URL: http://localhost:9099, API Key: 0p3n-w3bu!
Configure ModelsLab settings:
- Go to Admin Panel > Settings > Pipelines
- Find "ModelsLab Image Generation" pipeline
- Set your MODELSLAB_API_KEY and other preferences

⚙️ Configuration

Pipeline Valves (Settings)

Access these settings via Admin Panel > Settings > Pipelines > ModelsLab Image Generation:

Setting	Default	Description
MODELSLAB_API_KEY	(empty)	Your ModelsLab API key (required)
BASE_URL	`https://modelslab.com/api/v6`	ModelsLab API endpoint
DEFAULT_MODEL	`flux`	Default model for generation
ENABLE_SAFETY_CHECKER	`true`	Content filtering
ENABLE_PROMPT_ENHANCEMENT	`true`	Automatic prompt improvement
MAX_RETRIES	`3`	API request retry attempts
POLL_INTERVAL	`2`	Polling interval (seconds)
MAX_POLL_ATTEMPTS	`60`	Max polling attempts

Getting Your API Key

Visit ModelsLab Signup
Create a free account
Go to Dashboard > API Keys
Generate a new API key
Copy and paste into the pipeline settings

🎯 Available Models

Model	Description	Cost	Speed	Best For
flux	Latest SOTA model	$0.018	~30s	Professional, detailed images
sdxl	Stable Diffusion XL	$0.015	~15s	Artistic, creative content
playground-v2	Playground v2.5	$0.012	~20s	UI mockups, clean designs
stable-diffusion	Classic reliable	$0.008	~10s	Quick iterations, concepts

📖 Usage

Basic Usage

Once installed and configured, the ModelsLab models will appear in your Open WebUI model selector. Simply:

Start a new chat
Select a ModelsLab model (flux, sdxl, playground-v2, stable-diffusion)
Ask for an image: "Generate a beautiful sunset over mountains"
Watch the magic happen! ✨

Advanced Usage

Model Selection

Generate a professional headshot using the flux model

Detailed Prompts

Create a UI mockup for a mobile banking app using playground-v2, 
modern design, clean interface, blue and white color scheme

Size Control (via OpenAI API parameters)

Supported sizes: 1024x1024, 1024x1792, 1792x1024, 512x512, 256x256
Quality: "standard" or "hd" (affects generation steps)

Multiple Images

Generate 3 variations of a futuristic car design

💡 Example Prompts

Creative & Artistic

A dreamy watercolor painting of cherry blossoms in spring, soft pastels, ethereal lighting

Professional & Business

Modern office meeting room, glass walls, natural lighting, professional photography

UI & Design

Mobile app login screen, glassmorphism effects, modern design, dark theme

Product Visualization

Professional product shot of wireless earbuds, studio lighting, white background

🔧 Technical Details

API Integration

The pipeline acts as an OpenAI-compatible proxy:

Input: OpenAI Images API format
Processing: ModelsLab API with async polling
Output: OpenAI Images API response format

Request Flow

Open WebUI sends OpenAI format image request
Pipeline translates parameters to ModelsLab format
Makes request to ModelsLab API
Handles async processing with polling
Returns OpenAI-compatible response with image URLs

Error Handling

Invalid API Key: Clear error message with setup instructions
Model Not Found: Lists available models
Generation Failure: Detailed error information
Timeout Handling: Graceful timeout with retry options
Network Issues: Automatic retry with exponential backoff

🔍 Troubleshooting

Common Issues

"Invalid or missing ModelsLab API key"

Ensure you've set MODELSLAB_API_KEY in pipeline valves
Verify the key is correct at Dashboard
Check the key has sufficient credits

"Model not supported"

Available models: flux, sdxl, playground-v2, stable-diffusion
Check spelling and use exact model names

Generation timeout

Large/complex images take longer (up to 2 minutes)
Try simpler prompts or smaller sizes for testing
Check internet connection stability

Pipeline not appearing

Verify pipeline uploaded successfully
Check pipelines container logs: docker logs pipelines
Ensure Pipelines connection is active in Open WebUI

Poor image quality

Try more detailed, descriptive prompts
Use flux model for highest quality
Enable prompt enhancement in settings
Add quality terms: "high quality, detailed, professional"

Getting Help

📖 ModelsLab Documentation
💬 Open WebUI Discord
🐛 Open WebUI Issues
✉️ ModelsLab Support: support@modelslab.com

🤝 Contributing

Development Setup

Clone the repository:

git clone https://github.com/your-username/modelslab-openwebui-pipeline
cd modelslab-openwebui-pipeline

Install dependencies:
```
pip install -r requirements.txt
```
Run tests:
```
pytest tests/
```
Test the pipeline:
```
python modelslab_image_pipeline.py
```

Pipeline Structure

modelslab-openwebui-pipeline/
├── modelslab_image_pipeline.py  # Main pipeline implementation
├── requirements.txt             # Python dependencies
├── README.md                    # This documentation
├── examples/                    # Usage examples and guides
│   ├── basic_usage.md          # Getting started examples
│   ├── advanced_features.md    # Advanced usage patterns
│   └── troubleshooting.md      # Common issues and solutions
└── tests/                      # Test suite
    ├── test_pipeline.py        # Unit tests
    └── test_integration.py     # Integration tests

Testing

# Run all tests
pytest

# Run with coverage
pytest --cov=modelslab_image_pipeline

# Test specific functionality
pytest tests/test_pipeline.py::test_model_mapping -v

📊 Comparison with Other Options

vs OpenAI DALL-E

✅ 4 models vs 1
✅ $0.008-0.018 vs $0.020-0.080 per image
✅ Same OpenAI API compatibility
✅ More customization options

vs Stability AI Direct

✅ No complex SDK setup required
✅ Managed infrastructure
✅ Better Open WebUI integration
✅ Multiple models in one pipeline

vs Other Pipelines

✅ Purpose-built for image generation
✅ Comprehensive model selection
✅ Cost optimization features
✅ Production-ready error handling

🏆 Why ModelsLab Pipeline?

For Users

Cost Effective: Save up to 60% vs DALL-E
More Choice: 4+ models vs single provider pipelines
Better Results: Latest SOTA models like Flux
Seamless Integration: Works exactly like built-in image generation

For Developers

Clean Code: Well-documented, modular implementation
OpenAI Compatible: Standard API format for easy integration
Extensible: Easy to add new models and features
Battle Tested: Comprehensive error handling and edge cases

For Communities

Open Source: Transparent, auditable code
Community Driven: Addresses real user needs
Easy to Deploy: One-file pipeline installation
Cost Conscious: Democratizes access to premium AI models

📜 License

This ModelsLab Open WebUI Pipeline is provided under the MIT License.

🔗 Links

Made with ❤️ for the Open WebUI community

Bring professional AI image generation to your Open WebUI instance with ModelsLab's cutting-edge models and competitive pricing.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/open-webui/pipelines/pull/593 **Author:** [@adhikjoshi](https://github.com/adhikjoshi) **Created:** 2/18/2026 **Status:** 🔄 Open **Base:** `main` ← **Head:** `feat/add-modelslab-pipeline` --- ### 📝 Commits (1) - [`5e5b335`](https://github.com/open-webui/pipelines/commit/5e5b335bdcf90ef975e4c07ce36c03e4462e5ca9) feat: Add ModelsLab manifold pipeline ### 📊 Changes **1 file changed** (+443 additions, -0 deletions) <details> <summary>View changed files</summary> ➕ `examples/pipelines/providers/modelslab_manifold_pipeline.py` (+443 -0) </details> ### 📄 Description # 🎨 ModelsLab Image Generation Pipeline for Open WebUI **Professional AI image generation with 13+ cutting-edge models integrated into Open WebUI's Pipelines framework.** Transform your Open WebUI experience with ModelsLab's powerful image generation capabilities, featuring Flux, SDXL, Playground v2.5, and many more state-of-the-art models through OpenAI-compatible API format. ## ✨ Features - **13+ AI Models**: Flux, SDXL, Playground v2.5, Stable Diffusion, and more - **OpenAI API Compatible**: Seamless integration with Open WebUI's image generation system - **Competitive Pricing**: $0.008-$0.018 per image (vs $0.020-$0.080 for DALL-E) - **Professional Quality**: Latest SOTA models for stunning results - **Async Processing**: Handles long-running generations with progress tracking - **Cost Transparency**: Clear pricing display for each model - **Safety Features**: Content filtering and prompt enhancement - **Easy Configuration**: Admin panel valve settings ## 🚀 Quick Start ### Prerequisites - Open WebUI with Pipelines support - ModelsLab API key ([Get one free](https://modelslab.com/signup)) - Docker (recommended) or Python 3.8+ ### Installation #### Method 1: Direct Upload (Recommended) 1. **Download the pipeline file**: - Save `modelslab_image_pipeline.py` to your computer 2. **Upload via Admin Panel**: - Go to **Admin Panel > Settings > Pipelines** - Click **"+"** to add a new pipeline - Upload the `modelslab_image_pipeline.py` file - Pipeline will be automatically loaded 3. **Configure the pipeline**: - Set your **MODELSLAB_API_KEY** in the pipeline valves - Adjust other settings as needed (default values work well) 4. **Add as connection** (if needed): - Go to **Admin Panel > Settings > Connections** - Add Pipelines URL as OpenAI connection if not already connected #### Method 2: Via Pipelines Docker Container 1. **Run Pipelines container with ModelsLab pipeline**: ```bash docker run -d -p 9099:9099 \ --add-host=host.docker.internal:host-gateway \ -e PIPELINES_URLS="https://raw.githubusercontent.com/your-repo/modelslab_image_pipeline.py" \ -v pipelines:/app/pipelines \ --name pipelines --restart always \ ghcr.io/open-webui/pipelines:main ``` 2. **Connect to Open WebUI**: - Go to **Admin Panel > Settings > Connections** - Add connection: **URL**: `http://localhost:9099`, **API Key**: `0p3n-w3bu!` 3. **Configure ModelsLab settings**: - Go to **Admin Panel > Settings > Pipelines** - Find "ModelsLab Image Generation" pipeline - Set your **MODELSLAB_API_KEY** and other preferences ## ⚙️ Configuration ### Pipeline Valves (Settings) Access these settings via **Admin Panel > Settings > Pipelines > ModelsLab Image Generation**: | Setting | Default | Description | |---------|---------|-------------| | **MODELSLAB_API_KEY** | *(empty)* | Your ModelsLab API key (required) | | **BASE_URL** | `https://modelslab.com/api/v6` | ModelsLab API endpoint | | **DEFAULT_MODEL** | `flux` | Default model for generation | | **ENABLE_SAFETY_CHECKER** | `true` | Content filtering | | **ENABLE_PROMPT_ENHANCEMENT** | `true` | Automatic prompt improvement | | **MAX_RETRIES** | `3` | API request retry attempts | | **POLL_INTERVAL** | `2` | Polling interval (seconds) | | **MAX_POLL_ATTEMPTS** | `60` | Max polling attempts | ### Getting Your API Key 1. Visit [ModelsLab Signup](https://modelslab.com/signup) 2. Create a free account 3. Go to [Dashboard > API Keys](https://modelslab.com/dashboard/api-keys) 4. Generate a new API key 5. Copy and paste into the pipeline settings ## 🎯 Available Models | Model | Description | Cost | Speed | Best For | |-------|-------------|------|-------|----------| | **flux** | Latest SOTA model | $0.018 | ~30s | Professional, detailed images | | **sdxl** | Stable Diffusion XL | $0.015 | ~15s | Artistic, creative content | | **playground-v2** | Playground v2.5 | $0.012 | ~20s | UI mockups, clean designs | | **stable-diffusion** | Classic reliable | $0.008 | ~10s | Quick iterations, concepts | ## 📖 Usage ### Basic Usage Once installed and configured, the ModelsLab models will appear in your Open WebUI model selector. Simply: 1. **Start a new chat** 2. **Select a ModelsLab model** (flux, sdxl, playground-v2, stable-diffusion) 3. **Ask for an image**: "Generate a beautiful sunset over mountains" 4. **Watch the magic happen!** ✨ ### Advanced Usage #### Model Selection ``` Generate a professional headshot using the flux model ``` #### Detailed Prompts ``` Create a UI mockup for a mobile banking app using playground-v2, modern design, clean interface, blue and white color scheme ``` #### Size Control (via OpenAI API parameters) - Supported sizes: 1024x1024, 1024x1792, 1792x1024, 512x512, 256x256 - Quality: "standard" or "hd" (affects generation steps) ### Multiple Images ``` Generate 3 variations of a futuristic car design ``` ## 💡 Example Prompts ### Creative & Artistic ``` A dreamy watercolor painting of cherry blossoms in spring, soft pastels, ethereal lighting ``` ### Professional & Business ``` Modern office meeting room, glass walls, natural lighting, professional photography ``` ### UI & Design ``` Mobile app login screen, glassmorphism effects, modern design, dark theme ``` ### Product Visualization ``` Professional product shot of wireless earbuds, studio lighting, white background ``` ## 🔧 Technical Details ### API Integration The pipeline acts as an OpenAI-compatible proxy: - **Input**: OpenAI Images API format - **Processing**: ModelsLab API with async polling - **Output**: OpenAI Images API response format ### Request Flow 1. Open WebUI sends OpenAI format image request 2. Pipeline translates parameters to ModelsLab format 3. Makes request to ModelsLab API 4. Handles async processing with polling 5. Returns OpenAI-compatible response with image URLs ### Error Handling - **Invalid API Key**: Clear error message with setup instructions - **Model Not Found**: Lists available models - **Generation Failure**: Detailed error information - **Timeout Handling**: Graceful timeout with retry options - **Network Issues**: Automatic retry with exponential backoff ## 🔍 Troubleshooting ### Common Issues **"Invalid or missing ModelsLab API key"** - Ensure you've set `MODELSLAB_API_KEY` in pipeline valves - Verify the key is correct at [Dashboard](https://modelslab.com/dashboard/api-keys) - Check the key has sufficient credits **"Model not supported"** - Available models: `flux`, `sdxl`, `playground-v2`, `stable-diffusion` - Check spelling and use exact model names **Generation timeout** - Large/complex images take longer (up to 2 minutes) - Try simpler prompts or smaller sizes for testing - Check internet connection stability **Pipeline not appearing** - Verify pipeline uploaded successfully - Check pipelines container logs: `docker logs pipelines` - Ensure Pipelines connection is active in Open WebUI **Poor image quality** - Try more detailed, descriptive prompts - Use `flux` model for highest quality - Enable prompt enhancement in settings - Add quality terms: "high quality, detailed, professional" ### Getting Help - 📖 [ModelsLab Documentation](https://docs.modelslab.com) - 💬 [Open WebUI Discord](https://discord.gg/5rJgQTnV4s) - 🐛 [Open WebUI Issues](https://github.com/open-webui/open-webui/issues) - ✉️ ModelsLab Support: support@modelslab.com ## 🤝 Contributing ### Development Setup 1. **Clone the repository**: ```bash git clone https://github.com/your-username/modelslab-openwebui-pipeline cd modelslab-openwebui-pipeline ``` 2. **Install dependencies**: ```bash pip install -r requirements.txt ``` 3. **Run tests**: ```bash pytest tests/ ``` 4. **Test the pipeline**: ```bash python modelslab_image_pipeline.py ``` ### Pipeline Structure ``` modelslab-openwebui-pipeline/ ├── modelslab_image_pipeline.py # Main pipeline implementation ├── requirements.txt # Python dependencies ├── README.md # This documentation ├── examples/ # Usage examples and guides │ ├── basic_usage.md # Getting started examples │ ├── advanced_features.md # Advanced usage patterns │ └── troubleshooting.md # Common issues and solutions └── tests/ # Test suite ├── test_pipeline.py # Unit tests └── test_integration.py # Integration tests ``` ### Testing ```bash # Run all tests pytest # Run with coverage pytest --cov=modelslab_image_pipeline # Test specific functionality pytest tests/test_pipeline.py::test_model_mapping -v ``` ## 📊 Comparison with Other Options ### vs OpenAI DALL-E - ✅ 4 models vs 1 - ✅ $0.008-0.018 vs $0.020-0.080 per image - ✅ Same OpenAI API compatibility - ✅ More customization options ### vs Stability AI Direct - ✅ No complex SDK setup required - ✅ Managed infrastructure - ✅ Better Open WebUI integration - ✅ Multiple models in one pipeline ### vs Other Pipelines - ✅ Purpose-built for image generation - ✅ Comprehensive model selection - ✅ Cost optimization features - ✅ Production-ready error handling ## 🏆 Why ModelsLab Pipeline? ### For Users - **Cost Effective**: Save up to 60% vs DALL-E - **More Choice**: 4+ models vs single provider pipelines - **Better Results**: Latest SOTA models like Flux - **Seamless Integration**: Works exactly like built-in image generation ### For Developers - **Clean Code**: Well-documented, modular implementation - **OpenAI Compatible**: Standard API format for easy integration - **Extensible**: Easy to add new models and features - **Battle Tested**: Comprehensive error handling and edge cases ### For Communities - **Open Source**: Transparent, auditable code - **Community Driven**: Addresses real user needs - **Easy to Deploy**: One-file pipeline installation - **Cost Conscious**: Democratizes access to premium AI models ## 📜 License This ModelsLab Open WebUI Pipeline is provided under the MIT License. ## 🔗 Links - 🏠 [ModelsLab Homepage](https://modelslab.com) - 📖 [API Documentation](https://docs.modelslab.com) - 🎮 [Try the Playground](https://modelslab.com/playground) - 💬 [Open WebUI Discord](https://discord.gg/5rJgQTnV4s) - 🐙 [Open WebUI GitHub](https://github.com/open-webui/open-webui) - 📦 [Pipelines Repository](https://github.com/open-webui/pipelines) --- **Made with ❤️ for the Open WebUI community** *Bring professional AI image generation to your Open WebUI instance with ModelsLab's cutting-edge models and competitive pricing.* --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

bsakaguchi added the

pull-request

label

2026-10-18 21:06:29 +00:00