ChatGPT is an AI chatbot developed by OpenAI. It is designed to generate human-like text and can be guided by users to customize the response's length, tone, style, detail, and language. ChatGPT is versatile, used for tasks such as writing code, composing music, answering queries, and translating or summarizing text. It has been trained through a mix of supervised and reinforcement learning, and can retain a limited context of prior exchanges in a conversation. It also has the capability to access real-time information from the internet.