ChatGPT reaches 800 million weekly users as OpenAI’s value hits $500 billion

Sam Altman announces ChatGPT milestone at OpenAI Dev Day as the company expands its AI tools.
ChatGPT has grown to 800 million weekly users, with OpenAI launching new app-building tools and AI systems during its Dev Day keynote.

OpenAI CEO Sam Altman has announced that ChatGPT now reaches 800 million weekly active users, reflecting rapid growth across consumers, developers, enterprises and governments.

The figure marks another milestone for the company, which reported 700 million weekly users in August and 500 million at the end of March.

Altman shared the news during OpenAI’s Dev Day keynote, noting that four million developers are now building with OpenAI tools. He said ChatGPT processes more than six billion tokens per minute through its API, signalling how deeply integrated it has become across digital ecosystems.

The event also introduced new tools for building apps directly within ChatGPT and creating more advanced agentic systems. Altman states these will support a new generation of interactive and personalised applications.

OpenAI, still legally a nonprofit, was recently valued at $500 billion following a private stock sale worth $6.6 billion.

Its growing portfolio now includes the Sora video-generation tool, a new social platform, and a commerce partnership with Stripe, consolidating its status as the world’s most valuable private company.

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