Build a Hybrid RAG System with FAISS, BM25, LangGraph and Claude Sonnet Model

Last Updated on June 22, 2026 by Editorial Team Author(s): Alpha Iterations Originally published on Towards AI. Build a Hybrid RAG System with FAISS, BM25, LangGraph and Claude Sonnet Model Combine semantic search and keyword search into one powerful document Q&A app using Claude Sonnet 4.6 API, ste…

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