ChatGPT Reaches 400 Million Weekly Active Users

ChatGPT has reached over 400 million weekly active users, doubling its count since August 2024. "We feel very fortunate to serve 5 percent of the world every week," OpenAI COO Brad Lightcap said on X. Engadget reports: The latest milestone for the AI assistant comes after a huge uproar over new rival platform DeepSeek earlier in the year, which raised questions about whether the current crop of leading AI tools was about to be dethroned. OpenAI is on the verge of a move to simplify its ChatGPT offerings so that users won't have to select which reasoning model will respond to an input, and it will make its GPT-4.5 and GPT-5 models available soon in the chat and API clients. With GPT-5 being made available to OpenAI's free users, ChatGPT seems primed to continue expanding its audience base in the coming months.

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