{
  "kind": "fact",
  "studySlug": "citation-sources",
  "slug": "wikipedia-leads-the-current-citation-index",
  "title": "Wikipedia leads the current citation index",
  "description": "The current live citation graph still has a strong head domain.",
  "lastUpdated": "2026-04-17",
  "lastTested": "2026-04-17",
  "sourceStudyUrl": "/trakkr-research/citation-sources",
  "sourceStudyTitle": "Where AI Gets Its Answers",
  "claimIds": [
    "citation-sources:wikipedia-share",
    "citation-sources:total-citations"
  ],
  "relatedSlugs": [
    "answer:which-sources-dominate-ai-citations",
    "answer:how-concentrated-is-the-ai-citation-landscape",
    "tracker:source-category-share-tracker"
  ],
  "methodologySummary": "Built from the live citation index backing Trakkr Research, using 8,777,687 citations across 208,567 unique domains observed between October 3, 2025 and April 17, 2026.",
  "limitations": [
    "The live citation index is broader than the original December 2025 launch study, so percentages here should be read as the current benchmark.",
    "Domain share does not mean causal influence. It measures what models cited, not the full retrieval set.",
    "Category totals are domain-level rollups and may hide differences by model or query intent."
  ],
  "keywords": [
    "AI citations",
    "citation sources",
    "AI source preferences",
    "domain authority in AI"
  ],
  "schemaHints": {
    "pageType": "Article",
    "includeDataset": true
  },
  "claim": "en.wikipedia.org accounts for 6.43% of all citations in the current Trakkr index.",
  "supportingMetrics": [
    {
      "label": "Wikipedia share",
      "value": "6.43%",
      "detail": "en.wikipedia.org alone accounts for 564,191 citations."
    },
    {
      "label": "Citations analyzed",
      "value": "8.78M",
      "detail": "Current live citation index as of April 17, 2026."
    }
  ],
  "whyItMatters": "This is the clearest proof that AI systems repeatedly prefer dense, entity-rich reference pages.",
  "citationBlock": {
    "quote": "en.wikipedia.org accounts for 6.43% of all citations in the current Trakkr index.",
    "attribution": "Where AI Gets Its Answers - Trakkr Research",
    "url": "https://trakkr.ai/trakkr-research/citation-sources/facts/wikipedia-leads-the-current-citation-index"
  }
}