Raw SignalSep 23, 20261 min read1 source

Jev-as-a-judge in Langfuse Evaluators

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Langfuse announced Jev-based evaluators for its Evaluators product, enabling teams to use TypeSafe’s narrow decision model to score production observations.

The integration supports Choice, Score, and yes/no outputs, lets multiple questions run concurrently against the same state, and is positioned as a way to expand evaluation coverage at substantially lower input-token cost than LLM-as-a-judge approaches.

Evidence / sources

  1. 1langfuse.com/blog/2026-09-22-running-evals-with-jev
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