Advanced RAG

Hybrid search, HyDE, reranking, and multi-hop retrieval — techniques that meaningfully improve RAG quality.

What You Will Learn

• Hybrid search: combining dense vector search with BM25 sparse search
• HyDE (Hypothetical Document Embeddings): generate before retrieving
• Reranking: using a cross-encoder to re-score retrieved chunks
• Multi-hop retrieval: chaining retrievals for complex questions
• Query rewriting: using Claude to expand or rephrase the query first