OpenAI says has more than 1 billion active users OpenAI announced on Friday that it surpassed 1 billion active users across its AI interfaces, including ChatGPT, Codex, and ChatGPT Work, less than four years after launching ChatGPT in November 2022. The company also reported more than 2 million businesses using its models, despite facing increased competition from rivals. WASHINGTON — OpenAI announced on Friday that it had surpassed the symbolic milestone of 1 billion active users, less than four years after the launch of its popular chatbot ChatGPT. "Our models now reach more than one billion active users and more than two million businesses. As people gain confidence in the technology, they use it more deeply," the company said in a blog post. According to several US media outlets, the San Francisco-based startup had initially expected to reach the milestone earlier this year, after hitting 900 million weekly active users in late February, but faced increased competition from its rivals. OpenAI was founded in 2015, but did not launch its first consumer product, ChatGPT, until November 2022. By comparison, it took Facebook six years after launching its social network to reach one billion users. The figure cited by OpenAI on Friday covers all of its artificial intelligence AI interfaces, primarily ChatGPT but also Codex, its model dedicated to AI-assisted programming, as well as ChatGPT Work, a platform that allows users to access other external applic