IBM's STAIR Uses Book TOCs as Index, Slashing Hallucinations 65x vs RAG

IBM Research unveiled STAIR, a retrieval method that indexes long documents via their table-of-contents structure instead of vector chunks. It achieves 82.6% hit rate with hallucinations 65x lower than fine-tuned RAG, requiring no vector database, embeddings, or rerankers.

2026-09-25 ~ 2026-09-26 · 3 related posts

• IBM's STAIR retriever uses document structure instead of chunks, claims 65x less hallucination than RAG — anselm · 2026-09-25
• IBM's STAIR treats a book's table of contents as the index: 82.6% recall, 65x lower hallucination — alex_verem · 2026-09-26

1 near-duplicate retellings: alex_verem