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LangChain Observability: LangSmith Setup & Real Costs

For a LangChain or LangGraph app, turning on LangSmith tracing takes two environment variables and no code changes. Sampling and conditional tracing, tested 7. Sampling and conditional tracing, tested Sampling decides how many traces you send. LangSmith vs. Langfuse vs. OpenTelemetry: LangSmith is…

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  1. 2026-11-02 20:30 · DEV Community — AI
    LangChain Observability: LangSmith Setup & Real Costs

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