ChatGPT is a chatbot developed by OpenAI. It was published in November 2022 and became one of the fastest-growing consumer applications in the history. The chatbot is powered by the GPT-3.5 model. After the release of GPT-4, the model was made available for users of ChatGPT Plus, the premium tier of the web application.
ChatGPT is a frontend, API access is possible using the dedicated OpenAI platform.