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ChatGPT Near 1 Billion Weekly Users, Reaching Milestone in Under Four Years

ChatGPT Near 1 Billion Weekly Users, Reaching Milestone in Under Four Years

September 30, 2026
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Internal reports from OpenAI indicate that ChatGPT’s weekly active users are approaching 1 billion. Originally targeted for completion by year-end, the milestone arrived seven months late, yet remains one of the fastest user acquisitions in global internet history, achieved in under four years since launch. The company declined to comment on these figures.

Delayed by seven months, ChatGPT’s growth engine shifts gears

Several factors have slowed ChatGPT’s user expansion. Google’s Gemini integrates deeply with its massive search platform, capturing traffic at the entry point. Meanwhile, GPT-5, released last autumn, faced development hurdles and significant user criticism, which directly impacted its growth trajectory.

Furthermore, data from various research firms shows Anthropic’s Claude has gained market share during this period. While reaching 1 billion users is impressive, the seven-month delay highlights a shifting reality: ChatGPT’s initial lead is eroding as the AI chatbot market transitions from a monopoly to intense multi-player competition.

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