Source record

Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/introducing-langsmith-tuned-evaluators-starting-with-perceived-error.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

LangChain introduced LangSmith Tuned Evaluators, starting with a Perceived Error judge that automatically scores production agent traces. The product is a set of pre-built, versioned evaluators teams can attach to tracing projects to flag agent mistakes without relying on expensive frontier-model calls on every thread.

Pre-built evaluator shipped for production agent traces. Useful for LangSmith teams wanting coverage beyond sampled frontier-model judgments. States the cost-versus-coverage tradeoff it targets.

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