compare-gpt-vs-claude-vs-gemini (GPT vs Claude vs Gemini Comparison)

This example compares OpenAI's GPT-5.4, Anthropic's Claude Sonnet 4.6, and Google's Gemini 3.1 Pro Preview on riddle-solving tasks with cost, latency, and quality assertions.

You can run this example with:

npx promptfoo@latest init --example compare-gpt-vs-claude-vs-gemini
cd compare-gpt-vs-claude-vs-gemini

See the guide for more details.

Setup

Set the required environment variables:

export OPENAI_API_KEY=your-openai-key
export ANTHROPIC_API_KEY=your-anthropic-key
export GOOGLE_API_KEY=your-google-key

Run

npx promptfoo@latest eval

View

npx promptfoo@latest view