ChatGPT is an AI language model developed by OpenAI that works using the GPT (Generative Pre-trained Transformer) architecture.The model is pre-trained with vast amounts of data from various sources like books, websites, and forums to generate human-like responses.ChatGPT uses a Transformer brain with layers of attention mechanisms to focus on critical parts of a sentence.The model undergoes fine-tuning with supervised learning to improve responses and avoid offensive or incorrect outputs.