OPENAI API ONLY PARTLY MATCHED CHATGPT CITATIONS , PAPER FINDS

What happened: A preprint from researchers at the National University of Singapore and Xi'an Jiaotong University found that Google search results plus OpenAI's Responses API only partly reproduced the pages ChatGPT cited. Key numbers: The combination found 26.2% of pages and 48.7% of sites cited by GPT-5.5 Instant, and 28.3% of Why it matters: The authors say API or Google ranking-based tests would match more sites than pages, and suggest monitoring at both page and site level and running prompts multiple times. The paper is an arXiv preprint and did not test commercial tracking tools.

A preprint from researchers at the National University of Singapore and Xi'an Jiaotong University found that Google search results plus OpenAI's Responses API only partly reproduced the pages ChatGPT cited.

The authors say API or Google ranking-based tests would match more sites than pages, and suggest monitoring at both page and site level and running prompts multiple times. The paper is an arXiv preprint and did not test commercial tracking tools.