Hamel Husain: Jev works for Evals — an LLM judge is just a classifier
HamelHusain · x · 2026-09-20
Hamel Husain answers whether Jev can be used for evals: yes — an LLM judge is fundamentally a classifier, so validate it against human labels and don't overfit. He links his FAQ on why binary (pass/fail) evaluations beat 1-5 Likert scales: adjacent rating differences are subjective and inconsistent across annotators, statistical detection needs larger samples, and annotators default to midpoints. To track gradual progress, split sub-metrics into separate binary checks (e.g. "4 of 5 expected facts included") instead of using a scale.
Related event: LangChain Launches Jev-as-a-Judge on LangSmith Evals(9 posts)→
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