[KongchangAI]
Unverified50% confidenceFactExact time

BM25 (Best Matching 25) is a probabilistic retrieval function proposed in the Okapi system and remains the default similarity algorithm in Lucene/Elasticsearch to this day.

1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen

Sources

RAG Hybrid Search: Why Vector Retrieval Misses TS-999 and a Simple Fix

Related Entities

BM25conceptOkapiconceptLuceneproductElasticsearchproduct

Related Claims

VerifiedBM25 remains the default ranking algorithm for mainstream search engines such as Elasticsearch and Lucene.71% similar

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