ChatGPT is an AI chatbot developed by OpenAI, functioning as a 'language model' trained to predict text using patterns in language.It doesn't access the web during regular use, relies on previous training, and doesn't remember user identities.ChatGPT processes user input by breaking messages into tokens, scanning for patterns, predicting text, and generating responses based on probability.While it seems smart due to massive training data and a deep learning model, it can make mistakes and requires clear prompts for accurate responses.