Earned Media Drives 84% of AI Citations Across ChatGPT, Claude and Gemini
Earned media-journalism, academic research, and editorial coverage-accounts for 84% of all sources cited by major generative AI systems, according to analysis of more than 25 million links. Paid and advertorial content represents just 0.3% of citations.
The finding comes from the third edition of What Is AI Reading?, a study by Muck Rack tracking how ChatGPT, Claude, and Gemini cite sources. The pattern has held consistent across all three reports since July 2025, suggesting these are structural features of how AI systems source information rather than artifacts of model updates.
For PR and communications teams, the implication is direct: AI for PR & Communications strategies must center on earning media coverage. When consumers ask AI systems about products, competitors, or industry trends, the answers they receive depend almost entirely on editorial and earned coverage, not paid placements.
Journalism Represents One Quarter of All Citations
Journalism alone accounts for 27% of all links cited by AI systems, a figure that has remained stable across all three editions of the study. The research analyzed responses across 17 industries and multiple query types.
The type of question asked significantly influences what gets cited. Industry trend queries drive journalism citations at more than double the rate of how-to questions. Press releases appear almost exclusively in industry trend responses and at a rate 3.5 times higher than in best-of queries.
More than half of journalism citations come from articles published within the past 12 months, with citation volume dropping sharply after six months. This recency bias matters for timing media outreach.
Each AI System Operates as a Distinct Information Environment
The three platforms show markedly different citation behavior. ChatGPT cites sources in 96% of responses but averages just five citations per response. Gemini cites in 82% of responses with an average of eight. Claude is the most selective, providing citations in 55% of responses, but averages 13 sources when it does.
The most cited domains differ by platform. ChatGPT's most cited domain is Wikipedia. Claude's is PubMed Central. Gemini's is Reddit.
For journalism, Axios appears in ChatGPT's top three cited domains across 13 of 17 industries-the only journalism outlet to achieve that distinction across any provider. Neither the New York Times nor Reuters appears in the top three for any industry.
This variation means visibility strategies must account for which AI platform the target audience uses.
What This Means for Marketing and Communications Strategy
AI for Marketing leaders face a straightforward challenge: if a brand does not appear in the media coverage AI systems are reading, it will not appear in the answers AI gives. That absence has business consequences.
Communications teams should evaluate whether their media coverage strategy addresses the outlets and topics that AI systems prioritize. For most industries, that means focusing on outlets that drive journalism citations in the platforms their audience uses.
The data also suggests that earned media work-pitching stories, building journalist relationships, securing coverage-remains the most direct path to visibility in AI-generated answers. Paid content and advertorial placements have virtually no measurable impact on how AI systems source information.
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