RAG has evolved from basic vector retrieval into powerful hybrid systems. Starting with 2020’s FAIR paper and FAISS, the tech landscape shifted rapidly.

By 2021, Pinecone and Weaviate introduced hybrid search, merging BM25 keyword matching with neural embeddings. Today, tools like LangChain and Elasticsearch 8.0 allow developers to build sophisticated, multi-stage pipelines that slash hallucinations and boost retrieval precision by over 10%.

By 2021, Pinecone and Weaviate introduced hybrid search, merging BM25 keyword matching with neural embeddings. Today, tools like LangChain and Elasticsearch 8.0 allow developers to build sophisticated, multi-stage pipelines that slash hallucinations and boost retrieval precision by over 10%.