This was a joint briefing with The Alan Turing Institute. ChatGPT is a language model developed by OpenAI that generates human-like text through deep learning. These language models are trained on a massive corpus of text from the internet and can respond to a wide range of questions and prompts with remarkable fluency and accuracy, making them a popular tool with a variety of applications, with ChatGPT amassing over 100 million users since its launch in November 2022. However, the use of large language models also raises important questions about the limitations and ethical considerations of relying on AI-generated text. There are limitations to the information they can provide and the accuracy of their answers.