ChatGPT is a chatbot developed by OpenAI that was launched in November 2022. It is built on OpenAI's GPT-3 language model and has been fine-tuned for conversational responses. ChatGPT answers questions by utilizing its database of 570GB of text from books, articles and websites. It can provide detailed answers to questions across many domains but is limited in that it only responds in English and does not have answers to all possible questions.