Elasticsearch Hybrid Search: BM25 + kNN via Rescore

Hybrid search in Elasticsearch: wire BM25 and kNN with rescore so the first page balances exact and semantic relevance.
Follow a compact Python demo that builds a dense_vector index, runs kNN candidate recall, and uses BM25 rescore to preserve exact matches while surfacing related results.
Scales to real embeddings and ANN; practical outcome is improved top-k relevance for product, FAQ, and legal search. #Elasticsearch #VectorSearch #BM25 #kNN #InformationRetrieval #Python
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Видео Elasticsearch Hybrid Search: BM25 + kNN via Rescore канала Professor Py: Information Retrieval with Python