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About
Promptfoo is an open-source tool for testing and evaluating LLM apps — declarative test cases, side-by-side model comparison, red-teaming, and CI/CD integration. Used by OpenAI and Anthropic.
Why it made the leaderboard
It lets you write declarative test cases for prompts and run them in CI, so you catch quality and safety regressions before shipping instead of eyeballing outputs — the reason OpenAI and Anthropic use it.
Tags
evalllmprompt-testingred-teamingcitesting
Tech Stack
Node.jsDockerTypeScript
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