OpenAI is an American artificial intelligence research and deployment company headquartered in San Francisco. It develops large language models — AI systems trained on vast amounts of text data to generate human-like writing, answer questions, write code, and perform a wide range of reasoning tasks — as well as image-generation and other AI tools. OpenAI is best known for creating ChatGPT, an AI chatbot that, after its public launch in late 2022, became one of the fastest-adopted software products in history and kicked off the generative AI boom.