OpenAI — Weekly Active Users: 800 million

Note: The claim states 'OpenAI's Monthly Active Users = 800M (as of 2025-10)' but the source clearly indicates that 800 million is the WEEKLY active user count for October 2025, not monthly. The source explicitly states 'ChatGPT's actual MAU is expected to be under 1 billion' and notes that the 5.72 billion figure represents monthly visits (traffic), not unique users. The source distinguishes between WAU (800M confirmed) and MAU (under 1B estimated), directly contradicting the claim that MAU equals 800M. The additional context acknowledges this distinction ('WAU was 800M in October 2025 per Sam Altman, implying MAU significantly higher'), but the primary claim conflates WAU with MAU.