ChatGPT is a language model developed by OpenAI. It uses advanced machine learning algorithms to generate human-like text based on the input it receives. The model is trained on a massive corpus of text data, which enables it to generate responses to a wide range of questions and prompts. It can be used for various applications such as language translation, text summarization, question answering, and conversation generation. ChatGPT has demonstrated remarkable accuracy and fluency in generating text, making it a highly sought after tool for natural language processing tasks.