promptfoo--promptfoo/examples/compare-openai-models

compare-openai-models (OpenAI Model Comparison)

This example compares OpenAI's gpt-5.4 with gpt-5.4-mini across various riddles and reasoning tasks.

You can run this example with:

npx promptfoo@latest init --example compare-openai-models
cd compare-openai-models

Quick Start

1. Initialize this example by running:

   npx promptfoo@latest init --example compare-openai-models
   

2. Navigate to the newly created compare-openai-models directory:

   cd compare-openai-models
   

3. Set an OpenAI API key directly in your environment:

   export OPENAI_API_KEY="your_openai_api_key"
   

   Alternatively, you can set the API key in a .env file:

   OPENAI_API_KEY=your_openai_api_key
   

4. Run the evaluation with:

   npx promptfoo@latest eval --no-cache
   

   Note: the --no-cache flag is required because the example uses a latency assertion which does not support caching.

5. View the results:

   npx promptfoo@latest view
   

   The expected output will include the responses from both models for the provided riddles, allowing you to compare their performance side by side.

What this example demonstrates

This example compares OpenAI's GPT-5.4 with GPT-5.4 Mini across various riddles and puzzles. It demonstrates:

• Model comparison: Side-by-side evaluation of gpt-5.4 vs gpt-5.4-mini
• Cost and latency assertions: Ensuring responses meet performance thresholds
• Content validation: Using contains assertions to verify specific answers
• LLM-based grading: Using llm-rubric assertions for nuanced evaluation criteria
• Diverse test cases: A variety of riddles testing different reasoning capabilities