AI Engineer · AI

The unreasonable effectiveness of BM25 for agentic search — Jo Kristian Bergum, Hornet.dev

BM25 stands for Best Match 25, and the number is not a version. A group of researchers ran a long series of scoring experiments decades ago, the twenty fifth one worked best, and the name simply stuck. Jo Kristian Bergum has spent more than twenty years on search and retrieval, and his claim is that this thirty year old lexical function is making a comeback without having changed at all. What changed is the user. A model already knows entities, c

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