Source record

Published by LangChain Blog (T1.5 source). The original is at https://www.langchain.com/blog/jev-agent-evals-langsmith.

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 tested TypeSafe AI's Jev, a non-generative "System One" model, against LLM judges for agent evaluation across accuracy, repeatability, latency, and cost. The vendor claims up to 200x faster inference and 400x lower cost than LLMs on classification tasks.

Concrete benchmark of a new evaluator against LLM-as-judge with specific speed and cost numbers, plus a clear comparison of when code-based, LLM, and System One evaluators each make sense.

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