MCP & Data
4-Layer Retrieval Guide
Anthropic's four-layer retrieval recipe: Docling, contextual retrieval, hybrid BM25/vector search, and Cohere rerank to cut retrieval failures.
Published June 2026
Look inside
Anthropic published the exact recipe for a 67% retrieval improvement: four layers, measured independently. Docling for parsing, contextual retrieval to keep chunks self-describing, hybrid BM25 plus vector search, and a Cohere rerank pass at the end. The 67% is the full stack, not any single step, and the gain compounds layer by layer.
Or get the whole library
This is one of 154 guides in the Vault. Get every guide plus every future one with lifetime access for $297, less than buying 16 on their own.
Get the Vault →
