BM25 and modern retrieval: The Complete 2026 Guide

BM25 is the standard algorithm for keyword-based information retrieval. It has been the backbone of search engines for decades. In 2026, BM25 is used...

Dilshad Akhtar
Dilshad Akhtar
Published: 25 July 2026
3 min read
TL;DRAI summary
  • BM25 is the standard algorithm for keyword-based information retrieval.

BM25 is the standard algorithm for keyword-based information retrieval. It has been the backbone of search engines for decades. In 2026, BM25 is used alongside vector search in hybrid retrieval systems. What is BM25? BM25 stands for Best Match 25. It scores documents based on term frequency and...

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