There have been several headlines over the past week about an AI chatbot officially passing the Turing test.

These news reports are based on a recent preprint study by two researchers at the University of California, San Diego, in which four large language models (LLMs) were put through the Turing test. One model — OpenAI’s GPT-4.5 — was deemed indistinguishable from a human more than 70 percent of the time.

The Turing test has been popularized as the ultimate indicator of machine intelligence. However, there is disagreement about the validity of this test. In fact, it has a contentious history that calls into question how effective it really is at measuring machine intelligence.

So what does this mean for the significance of this new study?

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