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Reranking and Cross-Encoders for RAG

Learn the retrieve-then-rerank pattern, cross-encoder scoring, ColBERT late interaction, and where rerankers improve production RAG quality.

What you'll master

Two-stage retrieve-then-rerank architecture

Bi-encoder vs cross-encoder scoring

ColBERT late interaction and MaxSim

Latency and candidate-count trade-offs

Reranker evaluation for RAG

Medium18 min readIncludes code examples, architecture diagrams, and expert-level follow-up questions.

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Code examplesArchitecture diagramsModel answersScoring rubricCommon pitfallsFollow-up Q&A

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