RankEvolve Discovers Improved Lexical Retrieval Algorithms
Researchers introduce RankEvolve on Feb 18, 2026, an LLM-guided program-evolution framework that mutates, recombines, and selects executable ranking programs to improve lexical retrieval. Starting from BM25 and query likelihood seeds, the method is evaluated across 12 BEIR and BRIGHT datasets and transfers to full BEIR, BRIGHT, and TREC DL 19 and 20, demonstrating improved retrieval performance.
Scoring Rationale
Strong novelty and cross-benchmark transfer, but score limited by single-source arXiv preprint without peer review.
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