OpenAI's ChatGPT has surged to 900 million weekly active users, marking a 350% increase over the past 18 months. The company announced that more than 5% of these users are paid subscribers, with the subscriber base now exceeding 50 million consumers. This explosive growth represents a dramatic acceleration in adoption since ChatGPT first crossed the 200 million weekly active users threshold just a year and a half ago.

Monthly subscriber momentum has accelerated significantly, with January and February on track to be the largest months for new paid subscriptions in OpenAI's history. Users rely on ChatGPT for learning, writing, planning, and building projects, with the company emphasizing that scaling usage directly improves product performance through faster responses, higher reliability, and stronger safety measures. The platform's integration with Siri through iOS 18 and iOS 26 has likely contributed to this growth trajectory.

The chatbot landscape has evolved rapidly, with even Apple expected to pivot Siri toward AI chatbot functionality in iOS 27. While Apple initially partnered with OpenAI, it has since expanded its AI strategy to include a deal with Google for Gemini integration and opened Xcode to agentic coding tools from both Anthropic and OpenAI. This competitive environment underscores ChatGPT's dominant position as the primary entry point for AI usage worldwide, with OpenAI approaching the symbolic 1 billion weekly active users milestone that would cement its market leadership.