- ChatGPT was launched in November 2022 and gained over 1 million users in its first 5 days, making it one of the fastest adopted digital products. - ChatGPT is based on GPT-3, a large language model developed by OpenAI over many years using trillions of words from the internet to power conversational abilities. - ChatGPT can answer questions, write stories, programs, music and more based on its vast knowledge, but cannot provide fully trustworthy information, create harmful content, or replace all human jobs.