{"version":1,"type":"story","url":"https://digestai.news/story/chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers","json":"https://digestai.news/story/chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers.json","markdown":"https://digestai.news/story/chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers.md","slug":"chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers","headline":"ChatGPT cites PubMed more, drops Reddit and Wikipedia in US answers","summary":"Ahrefs data shows ChatGPT’s most-cited sites in US answers shifted from March to September 2024. PubMed rose from 64th to 4th place, while WebMD fell from 18th to 79th. Government health sites, regulators, and product testers gained prominence, while health/finance explainers like Britannica and Investopedia dropped out of the top 200. Reddit’s share of cited domains dropped from 19.1% to 2.3%, and Wikipedia’s from 14.1% to 2.9%, though both remain in the top 200 overall.","keyPoints":["PubMed climbed to 4th place in ChatGPT’s US citations (March: 64th), while WebMD dropped to 79th (March: 18th)","Reddit’s share of cited domains fell from 19.1% to 2.3% in US answers, Wikipedia’s from 14.1% to 2.9%","14.4% of 66.6M free ChatGPT responses included web searches, averaging 1.6 fan-out queries per search"],"whyItMatters":"The shift toward primary sources like PubMed and regulators may reduce reliance on explainers, affecting SEO for health/finance sites. Publishers should audit ChatGPT’s citations for their topics to adapt content strategies.","category":{"slug":"marketing","name":"Marketing & Small Business","url":"https://digestai.news/category/marketing"},"entities":{"companies":["Ahrefs","OpenAI","PubMed","WebMD","Verywell Health","Healthline"],"models":["GPT-5.6 Luna","GPT-5.6 Sol"],"people":[]},"firstPublishedAt":"2026-10-12T18:41:59Z","updatedAt":"2026-10-12T18:41:59Z","sourceCount":1,"hasPrimarySource":false,"sources":[{"outlet":"Search Engine Journal","title":"ChatGPT’s Most-Cited Sites Tilt Toward Primary Sources, Data Shows via @sejournal, @MattGSouthern","url":"https://searchenginejournal.com/chatgpt-most-cited-sites-primary-sources-ahrefs/592682","publishedAt":"2026-10-12T18:41:59Z","type":"press","primary":false,"lead":true}],"sourceNotes":null,"discussions":[],"thread":{"title":"Shifting Sources in AI Medical Citations","url":"https://digestai.news/thread/wikipedia-podcasts-and-reddit-drive-ai-citations","storyCount":3},"cite":{"text":"Digest AI, \"ChatGPT cites PubMed more, drops Reddit and Wikipedia in US answers\", 12 October 2026, https://digestai.news/story/chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers","publisher":"Digest AI","title":"ChatGPT cites PubMed more, drops Reddit and Wikipedia in US answers","datePublished":"2026-10-12T18:41:59Z","url":"https://digestai.news/story/chatgpt-cites-pubmed-more-drops-reddit-and-wikipedia-in-us-answers"},"generatedBy":"Written by Digest AI's editorial model from the linked sources; the sources are the record.","license":"Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse"}