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Lunary

Open Source Updated 14d ago

Open-source LLM observability with cost tracking and prompt versioning

pip install lunary

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Lunary is an open-source AI observability platform for LLM apps. Track prompts, completions, costs, and latency across all your AI calls. Supports OpenAI, Anthropic, and any LLM via LangChain, LlamaIndex, or raw API. Includes prompt versioning, user session tracking, and feedback collection. Self-hostable.

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llmobservabilityopen-sourceself-hostedcost-trackingpromptslangchainai

View on GitHub ★ 2,000TypeScript

Using this saves ~120k tokens vs building from scratch

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