Some scientists are using chatbots to write all or part of their papers. 454 words that have increased in studies since ChatGPT was released (Jul 2025) Delving into LLM-assisted writing in biomedical publications through excess vocabulary Study

[Michael Harrop]

https://www.nytimes.com/2025/07/02/health/ai-chatgpt-research-papers.html
https://www.science.org/doi/10.1126/sciadv.adt3813

Abstract​

Large language models (LLMs) like ChatGPT can generate and revise text with human-level performance. These models come with clear limitations, can produce inaccurate information, and reinforce existing biases. Yet, many scientists use them for their scholarly writing.

But how widespread is such LLM usage in the academic literature? To answer this question for the field of biomedical research, we present an unbiased, large-scale approach: We study vocabulary changes in more than 15 million biomedical abstracts from 2010 to 2024 indexed by PubMed and show how the appearance of LLMs led to an abrupt increase in the frequency of certain style words.

This excess word analysis suggests that at least 13.5% of 2024 abstracts were processed with LLMs. This lower bound differed across disciplines, countries, and journals, reaching 40% for some subcorpora. We show that LLMs have had an unprecedented impact on scientific writing in biomedical research, surpassing the effect of major world events such as the COVID pandemic.

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I think this is a huge problem given how flawed the peer review system is. I highly doubt that peer review is able to adequately fact-check the papers and all the citations. So the quality and reliability of scientific papers is likely decreasing dramatically. And as flawed as they may be, they're still the most reliable source of factual information we have. So losing it is a big problem.