CMU study reveals hidden answer drift in RAG systems during index updates

CMU researchers found that RAG systems can experience hidden answer drift when the index or corpus is updated, even as overall accuracy stays nearly unchanged. They propose snapshot compatibility audits to estimate this extra answer fluctuation beyond utility evaluations.

2026-08-25 ~ 2026-08-25 · 2 related posts

• CMU Study Reveals Answer Churn in RAG Systems During Index Updates — CarnegieMellonU · 2026-08-25
• RAG corpus expansion causes answer churn even when accuracy barely changes, audit method proposed — _reachsumit · 2026-08-25