That credibility gap, while small, is concerning given that the problem of AI-generated disinformation seems poised to grow significantly, says Giovanni Spitale, the researcher at the University of Zurich who led the study, which appeared in Science Advances today. "The fact that AI-generated disinformation is not only cheaper and faster, but also more effective, gives me nightmares," he says. He believes that if the team repeated the study with the latest large language model from OpenAI, GPT-4, the difference would be even bigger, given how much more powerful GPT-4 is. To test our susceptibility to different types of text, the researchers chose common disinformation topics, including climate change and covid. Then they asked OpenAI's large language model GPT-3 to generate 10 true tweets and 10 false ones, and collected a random sample of both true and false tweets from Twitter.