ChatGPT, developed by OpenAI, is based on the GPT-4 architecture. It is an advanced language model designed to understand and generate human-like text, capable of engaging in complex conversational dialogue and performing a wide range of text-based tasks. This model has been trained on diverse datasets, enabling it to provide coherent and contextually relevant responses. ChatGPT is utilized in various applications, including customer service, content creation, and educational tools, demonstrating its versatility and effectiveness in understanding and generating natural language.