Braintrust

Eval-first LLM development platform.

What is Braintrust?

Eval-first LLM dev platform. Treat prompts and chains like real software with tests, scoring, and CI checks.

Tracing, evaluation, and debugging for LLM apps. Built by the LangChain team.

The dashboarding layer for metrics, logs, and traces.

Open-source distributed tracing.

Drop-in LLM observability proxy.

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