Search Results
3 results for “information-retrieval”
Foundations
BM25
BM25 (Best Matching 25) is a probabilistic ranking function used in information retrieval that scores documents based on query term frequency, inverse document frequency, and document length normalisation.
7 min readUpdated June 2026
Applications
Hybrid Search
Hybrid search is a retrieval technique that combines sparse keyword-based search (typically BM25) with dense vector semantic search to achieve superior recall and precision over either method alone.
6 min readUpdated June 2026
Applications
Reranking
Reranking is a two-stage information retrieval technique in which a fast first-stage retriever generates candidate documents, and a more accurate but computationally expensive model re-scores and reorders them.
6 min readUpdated June 2026