ChatGPT is a large language model, which uses algorithms to analyze a massive corpus of text to respond to user requests in language that can sound surprisingly human.
It's refined using a tactic called reinforcement learning from human feedback.
The language model was created by OpenAI, a San Francisco research lab that was founded in 2015 with a combined $1 billion pledge from chief executive Sam Altman, Musk, billionaire venture capitalist Peter Thiel and others.
It massed over a million users in its first week.
https://www.washingtonpost.com/technology/2022/12/06/what-is-chatgpt-ai/