AnalysisDevelopersSeptember 16, 2026

AI21 Labs talk argues fixed-size chunking breaks RAG retrieval

AI21 Labs' Yuval Belfer shows a 100-token chunk returns Jerry's favorite church at rank one in Seinfeld transcripts while larger windows bury it below rank fifty. The same small chunks fail on questions whose answer spans the corpus, such as who Jerry calls his nemesis.

People · Yuval Belfer

1 source

More stories today

Open the live feed