---
type: "raw_signal"
id: "jev-as-a-judge-in-langfuse-evaluators-252d9d"
slug: "jev-as-a-judge-in-langfuse-evaluators-252d9d"
title: "Jev-as-a-judge in Langfuse Evaluators"
description: "Langfuse announced Jev-based evaluators for its Evaluators product, enabling teams to use TypeSafe’s narrow decision model to score production observations."
retrieval_nugget: "Langfuse announced Jev-based evaluators for its Evaluators product, enabling teams to use TypeSafe’s narrow decision model to score production observations."
observed_at: "2026-09-23"
record_date: "2026-09-23"
date_kind: "observed_at"
why_it_matters: "Source: https://langfuse.com/blog/2026-09-22-running-evals-with-jev"
novelty: "notable"
verification_level: "source-linked"
signal_type: "release"
source_platform: "langfuse.com"
topics: []
entities: []
related_patterns: []
source_url: "https://langfuse.com/blog/2026-09-22-running-evals-with-jev"
source_urls: ["https://langfuse.com/blog/2026-09-22-running-evals-with-jev"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "signal:jev-as-a-judge-in-langfuse-evaluators-252d9d"
status: "published"
visuals: []
routes: {"html":"https://newruntime.com/signals/jev-as-a-judge-in-langfuse-evaluators-252d9d/","markdown":"https://newruntime.com/signals/jev-as-a-judge-in-langfuse-evaluators-252d9d.md","json":"https://newruntime.com/signals/jev-as-a-judge-in-langfuse-evaluators-252d9d.json"}
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
---

# Jev-as-a-judge in Langfuse Evaluators

## Retrieval answer

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

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.

Source: https://langfuse.com/blog/2026-09-22-running-evals-with-jev

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

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