Hybrid Search in Elasticsearch: Improve RAG Accuracy with BM25 & kNN 26 Mar 2026 Post a Comment Relying solely on dense vector search often causes Retrieval-Augmented Generation (RAG) systems to fail when users search for exact technical terms… BM25ElasticsearchElasticsearch kNNHybrid SearchRAG AccuracyReciprocal Rank FusionSemantic SearchVector Search
