How to Implement a Hybrid Search RAG Pipeline using FAISS and BM25

Question

May i know How to Implement a Hybrid Search RAG Pipeline using FAISS and BM25.

Answer 1

You can implement a Hybrid Search RAG Pipeline using FAISS for dense retrieval and BM25 for sparse retrieval by combining their outputs to enhance retrieval quality before passing results to a generator.

Here is the code snippet below:

In the above code we are using the following key points:

• BM25Okapi for sparse keyword-based retrieval.

• FAISS with SentenceTransformer embeddings for dense vector search.

• RAG model to fuse retrieved contexts into answer generation.

Hence, this hybrid search pipeline balances semantic and lexical matching to enhance the overall performance of retrieval-augmented generation.