OpenAI has 800 million active users.

Judge as of 2025-09-26. The test is OpenAI's reported active-user count at or shortly before that date. 'Active users' is read as weekly active users, the measure OpenAI uses publicly. True: an official OpenAI announcement, or credible reporting of OpenAI figures, puts users at about 800 million (roughly 750–850 million) on or before 2025-09-26. Mostly true: the figure was about 700 million at the time and 800 million was announced within weeks. In that case the number is a small overstatement of a real, near-term figure. Mostly false: the actual figure at the time was well below 800 million (roughly 500–700 million), or the 800 million refers to a different metric that the claim distorts. False: the evidence shows a figure far from 800 million (for example under 500 million or over 1.2 billion).

Set before the research began.

1. E1 Sam Altman says ChatGPT has hit 800M weekly active users | TechCrunch TechCrunch · 6 October 2025

   “OpenAI CEO Sam Altman said Monday that ChatGPT has reached 800 million weekly active users, marking an increase of adoption among consumers, developers, enterprises, and governments.”

2. E2 OpenAI says ChatGPT is on track to reach 700M weekly users | TechCrunch TechCrunch · 4 August 2025

   “the chatbot is on track to hit 700 million weekly active users this week, the company says.”

3. E3 ChatGPT has more than 800 million weekly active users, says Altman Tech.eu · 7 October 2025

   “ChatGPT now has more than 800 million weekly active users, according to Sam Altman, the CEO of OpenAI, which introduced a wave of new products and partnerships at its developer day conference.”

4. E4 ChatGPT has more than 800 million weekly active users, says Altman Tech.eu · 7 October 2025

   “The 800 million figure marks an uptick on the 700 million weekly active users OpenAI said ChatGPT was expected to hit in August this year, which was up from 500 million in March this year.”

E2 reports that in early August 2025 OpenAI said ChatGPT was on track to reach 700 million weekly active users. The 800 million figure was announced by Sam Altman on 2025-10-06, about ten days after the claim (E1, E3). E4 describes it as an increase on the 700 million figure from August. Under the criteria, the last reported figure before the claim was about 700 million (August) [E2][E4], with 800 million announced within weeks [E1], which makes the claim mostly true.