Verified75% confidenceFactTime unknown
BM25 remains the default ranking algorithm for mainstream search engines such as Elasticsearch and Lucene.
5
Sources
75%
Confidence
Long-term
Relevance
5/31/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedModern search systems usually combine lexical ranking with other signals rather than replacing BM25, and BM25's reliability on exact matches is still difficult for vector retrieval to fully replace.68% similarVerifiedBM25 is a classic keyword retrieval algorithm based on term frequency statistics, which is complementary to vector retrieval.68% similarVerifiedHybrid Search combines Dense Retrieval with sparse retrieval (BM25).66% similar
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