Hybrid RAG: Parallel Retrieval, Fusion, Reranking, and Multimodal Pipelines
In the last post we built a naive RAG pipeline. It works, but it has a blind spot: it only understands meaning, not exact words. Search for error code “ERR-4052” and the semantic retriever might miss the one document that contains that exact string. This is the vocabulary mismatch problem, and hybrid RAG is how you fix it.