ChatGPT Hits 1 Billion Users, Surpasses Previous Records

ChatGPT has reached 1 billion users, a faster pace than any other app in history. This milestone demonstrates strong growth and adoption for the AI chatbot.

OpenAI's ChatGPT crossed 1 billion monthly active users in May 2026, making it the fastest product in history to reach that scale, roughly two and a half years after launch and ahead of TikTok, Instagram and YouTube.

The milestone underscores OpenAI's commercial lead even as competition intensifies. ChatGPT is growing about 62% year over year, while rival Anthropic's Claude posted a far steeper 640% annual growth rate off a smaller ~56 million-user base. Microsoft MSFT, OpenAI's largest backer, stands to benefit from Azure consumption tied to that usage.

The surge arrives as both labs move toward public markets: Anthropic confidentially filed for a U.S. IPO on June 1, with OpenAI expected to submit its own prospectus in the coming weeks. The question for investors is whether ChatGPT's scale converts into durable monetization as engagement increasingly splits across competing assistants rather than consolidating around one.