LLM Judges Require Over 50% Human Alignment for Statistical Efficacy

To provide statistical benefits over pure human annotation, an LLM judge must achieve an Inter-Rater Reliability of roughly 0.50 with humans. Below this alignment threshold, PPI-corrected tests using LLM judges do not offer significant statistical efficacy.

2026-07-27 ~ 2026-07-27 · 3 related posts

• LLM judges only improve statistical power when human alignment reaches about 50% — IanArawjo · 2026-07-27
• LLM judges need roughly 0.50 alignment with humans to be worth reporting — IanArawjo · 2026-07-27
• PPI-corrected tests can beat human-only labels, but only with enough judge alignment — IanArawjo · 2026-07-27