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provider-fal (fal.ai Image Generation Example)
You can run this example with:
npx promptfoo@latest init --example provider-fal
cd provider-fal
Demonstrates how to evaluate and compare image generation models using promptfoo.
Setup
- Get your API key from fal.ai dashboard
- Set environment variable:
export FAL_KEY=your-fal-key-here - Install client:
npm install @fal-ai/client - Run the evaluation:
promptfoo eval
What This Example Shows
- Model comparison: Two different fal.ai models side-by-side
- Creative prompts: 7 test cases with artistic styles
- Reproducible results: Fixed seeds for consistent outputs
- Configuration options: Different settings per model
Example Output
The evaluation generates a comparison table showing:
- Model performance across different prompts
- Generated images in markdown format
- Execution time and caching behavior
View Results
promptfoo view
Opens the web interface to browse generated images and compare model outputs.
Customize the Example
Edit promptfooconfig.yaml to:
- Try different models from fal.ai/models
- Add your own prompts
- Adjust model parameters
- Add assertions to test output quality
- Route SDK requests through a proxy with
config.client.proxyUrlwhen your environment requires it