X Community Notes

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  "filePath": "knowledge-base/responses/community-notes.mdx",
  "title": "X Community Notes",
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  "lastUpdated": "2026-01-30",
  "dateCreated": "2026-02-15",
  "summary": "Community Notes uses a bridging algorithm requiring cross-partisan consensus to display fact-checks, reducing retweets 25-50% when notes appear. However, only 8.3% of notes achieve visibility, taking median 7 hours (mean 38.5 hours) by which time 96.7% of spread has occurred, limiting aggregate effectiveness despite high accuracy (98% for COVID-19 notes).",
  "description": "Crowdsourced fact-checking system using bridging algorithms to surface cross-partisan consensus. 500K+ contributors, 8.3% note visibility rate, 25-50% repost reduction when notes display. Open-source algorithm enables independent verification.",
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  "category": "responses",
  "subcategory": "epistemic-platforms",
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    {
      "text": "50% reduction in retweets",
      "url": "https://orbilu.uni.lu/bitstream/10993/59462/1/3686967.pdf",
      "resourceId": "1e3aaa89eb7581f9",
      "resourceTitle": "Did the Roll-Out of Community Notes Reduce Engagement ..."
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      "text": "38.5 hours",
      "url": "https://ddia.org/en/a-deep-dive-into-xs-community-notes-report",
      "resourceId": "084acaa14c3d8bf4",
      "resourceTitle": "A Deep Dive into X's Community Notes: An Analysis of English and Spanish"
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    {
      "text": "96.7% of reposts",
      "url": "https://arxiv.org/html/2510.09585v2",
      "resourceId": "370352fee047177c",
      "resourceTitle": "From Birdwatch to Community Notes, from Twitter to X - arXiv"
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    {
      "text": "fully open-source algorithm",
      "url": "https://github.com/twitter/communitynotes",
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    {
      "text": "Chuai et al., 2024",
      "url": "https://dl.acm.org/doi/10.1145/3686967",
      "resourceId": "76a80ca668a5b587",
      "resourceTitle": "Did the Roll-Out of Community Notes Reduce Engagement With Misinformation on X/Twitter? | Proceedings of the ACM on Human-Computer Interaction"
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      "text": "Chuai et al., 2024",
      "url": "https://dl.acm.org/doi/10.1145/3686967",
      "resourceId": "76a80ca668a5b587",
      "resourceTitle": "Did the Roll-Out of Community Notes Reduce Engagement With Misinformation on X/Twitter? | Proceedings of the ACM on Human-Computer Interaction"
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    {
      "text": "Twitter internal surveys",
      "url": "https://en.wikipedia.org/wiki/Community_Notes",
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    {
      "text": "Allen et al., 2024",
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      "resourceTitle": "Did the Roll-Out of Community Notes Reduce Engagement With Misinformation on X/Twitter? | Proceedings of the ACM on Human-Computer Interaction"
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      "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC11212665/",
      "resourceId": "4b3159d80fde3585",
      "resourceTitle": "Community notes increase trust in fact-checking on social media"
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      "text": "DDIA, 2025",
      "url": "https://ddia.org/en/a-deep-dive-into-xs-community-notes-report",
      "resourceId": "084acaa14c3d8bf4",
      "resourceTitle": "A Deep Dive into X's Community Notes: An Analysis of English and Spanish"
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      "text": "DDIA, 2025",
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      "resourceId": "084acaa14c3d8bf4",
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      "text": "Renault, Mosleh, and Rand (2025)",
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      "text": "2024 citation analysis",
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      "text": "churn",
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      "resourceTitle": "ArXiv preprint on Community Notes helpfulness rates and timing."
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      "text": "fully public",
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      "text": "epistemic infrastructure",
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      "text": "consensus mechanisms",
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      "resourceTitle": "Is EA prepared for an influx of new, medium-sized donors?"
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