{
  "model_name": "BM25",
  "model_type": "Lexical",
  "organization": "Open Source",
  "description": "Classic lexical search algorithm based on term frequency and inverse document frequency",
  "paper": "Robertson et al., 1994",
  "code": "https://github.com/elastic/elasticsearch",
  "open_source": true,
  "api_available": false,
  "evaluation_date": "2026-01-18",
  "metrics": {
    "recall@5": 9.37,
    "recall@10": 14.77,
    "recall@25": 23.84,
    "recall@50": 30.70,
    "precision@5": 11.96,
    "precision@10": 10.43,
    "precision@25": 7.39,
    "precision@50": 5.50
  }
}