A generative pre-trained transformer (GPT) is a type of large language model (LLM) that is widely used in generative artificial intelligence chatbots. GPTs are based on a deep learning architecture called the transformer. They are pre-trained on large datasets of unlabeled content, and able to generate novel content. Source: Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Generative_pre-trained_transformer