A large language model (LLM) is a type of artificial intelligence (AI) that's been trained on a massive dataset of text and code. This allows them to understand and generate human-like language in a variety of ways, making them potentially incredibly versatile tools. They do have their downsides, particularly that they can confidently hallucinate – invent, in other words – false answers and information. You should use this experimental and unproven technology with care.