OpenAI CEO Sam Altman announced on Monday that ChatGPT has reached 800 million weekly active users, reflecting a rapid rise in adoption among consumers, developers, businesses, and governments.
Altman shared the update during his keynote at OpenAI’s Dev Day 2025, noting that the platform’s growth has been fueled by an expanding ecosystem of developers and enterprise users.
“Today, 4 million developers have built with OpenAI,” Altman said. “More than 800 million people use ChatGPT every week, and we process over 6 billion tokens per minute on the API. Thanks to all of you, AI has gone from something people play with to something people build with every day.”
ChatGPT’s growth has been striking. In August, OpenAI reported it was nearing 700 million weekly active users, a jump from 500 million at the end of March. The company’s expansion comes as it races to secure more AI chips and scale its infrastructure to support rising demand.
At Dev Day, OpenAI also unveiled new tools that let developers build applications directly inside ChatGPT, as well as advanced systems for creating more interactive and personalized AI experiences.
Since its launch in November 2022, ChatGPT has become one of the fastest-growing online services in history, transforming from a simple conversational tool into a global productivity and learning platform. Recently, OpenAI introduced Pulse, a proactive feature that sends personalized morning briefs to users.
Despite its success, ChatGPT has faced scrutiny over issues like AI errors and overconfidence, including a recent case involving a user who was misled into thinking he’d made a mathematical discovery with the chatbot’s help.
OpenAI, still legally structured as a nonprofit, became the most valuable privately held company in the world last week after a $6.6 billion private stock sale valued it at $500 billion.
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The company continues to innovate at a fast pace, recently releasing a new version of its video-generation tool Sora and launching a social media network alongside it. OpenAI also partnered with Stripe to debut a new agentic commerce platform, further signaling its push into real-world AI applications.
