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// AI Scoring & Evals

PromptFoo: The Best Open Source Tool for LLM Prompt Evaluation

PromptFoo lets you define test cases in YAML, run them against multiple models and prompt variants in parallel, and get comparison reports in minutes. Here is a complete setup guide.

May 17, 2026

8 min read

Mahmudul Haque Qudrati

CEO & ML Engineer

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Machine Learning

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AI Scoring & Evals

PromptFoo: The Best Open Source Tool for LLM Prompt Evaluation

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