ChatGPT is an artificial intelligence chatbot developed by OpenAI, providing immediate responses, document and photo chat, multi-document summaries and analyses, professional advice, and creative inspiration through the use of the latest model improvements, including access to OpenAI's o1-preview—the most advanced model available. This early version is currently only accessible to ChatGPT Plus, Team, Enterprise, and Education users, with a complete experience expected to be rolled out to all users later this year.