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% of the time.

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

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