Shifting Sources in AI Medical Citations
This saga tracks the evolving sources that AI models cite in their responses, highlighting a shift from general web platforms to specialized medical databases. The latest episode reveals that ChatGPT now prioritizes PubMed over Reddit and Wikipedia for US-based answers.
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ChatGPT cites PubMed more, drops Reddit and Wikipedia in US answers
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,…
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Ahrefs studies 15M ChatGPT fan-out queries to map search behavior
Ahrefs analyzed 15 million fan-out queries from 66.6 million free, logged-out ChatGPT responses between August and September 2026. Only 14.4% of responses triggered a web search, with an average of…
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Wikipedia, podcasts, and Reddit drive AI citations
Wikipedia tops AI citation studies, with more than 25 million AI‑cited links and 42 % of citations coming from process or technology pages. Podcast transcripts are turning into permanent training…
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