{
  "altLabels": [
    "Hit@K",
    "Hits@K",
    "Hit Rate@K"
  ],
  "definition": "A cutoff evaluation metric indicating whether at least one relevant item appears within the top K results.",
  "distinctions": [
    {
      "reason": "Success@K is binary per query; Precision@K measures the fraction of top-K results that are relevant.",
      "statement": "Success@K is not Precision@K.",
      "target": "precision-at-k",
      "targetLabel": "Precision@K",
      "targetUri": "https://id.searchplex.net/precision-at-k/"
    },
    {
      "reason": "Success@K asks whether at least one relevant item appears in the top K; Recall@K measures how much of the relevant set appears in the top K.",
      "statement": "Success@K is not Recall@K.",
      "target": "recall-at-k",
      "targetLabel": "Recall@K",
      "targetUri": "https://id.searchplex.net/recall-at-k/"
    }
  ],
  "id": "success-at-k",
  "kind": "Metric",
  "license": "https://creativecommons.org/publicdomain/zero/1.0/",
  "links": [
    {
      "label": "Hit Rate metric",
      "type": "officialHomepage",
      "url": "https://docs.futureagi.com/future-agi/products/evaluate/metrics/retrieval/hit-rate"
    }
  ],
  "modifiedAt": "2026-09-14T06:43:46Z",
  "prefLabel": "Success@K",
  "publisher": {
    "name": "Searchplex",
    "url": "https://searchplex.net/"
  },
  "relations": [
    {
      "target": "cutoff-metric",
      "type": "broader"
    },
    {
      "target": "recall-metric",
      "type": "broader"
    },
    {
      "target": "ranking",
      "type": "evaluates"
    },
    {
      "target": "retrieval",
      "type": "evaluates"
    },
    {
      "note": "Success@K is binary per query; Precision@K measures the fraction of top-K results that are relevant.",
      "target": "precision-at-k",
      "type": "notEquivalentTo"
    },
    {
      "note": "Success@K asks whether at least one relevant item appears in the top K; Recall@K measures how much of the relevant set appears in the top K.",
      "target": "recall-at-k",
      "type": "notEquivalentTo"
    },
    {
      "target": "mrr",
      "type": "related"
    },
    {
      "target": "precision-at-k",
      "type": "related"
    },
    {
      "target": "qrels",
      "type": "related"
    },
    {
      "target": "recall-at-k",
      "type": "related"
    }
  ],
  "representations": {
    "html": "https://id.searchplex.net/success-at-k/",
    "json": "https://id.searchplex.net/success-at-k.json",
    "jsonld": "https://id.searchplex.net/success-at-k.jsonld"
  },
  "scheme": "https://id.searchplex.net/scheme/",
  "scopeNote": "Success@K is a binary per-query metric often averaged across queries. It is commonly called Hit@K or Hits@K in recommendation, RAG, and retrieval evaluation settings.",
  "status": "published",
  "uri": "https://id.searchplex.net/success-at-k/"
}