One billion people used ChatGPT in a single month. Let that sink in for a moment.
OpenAI’s flagship app hit 1 billion monthly active users in May 2026, according to data from Sensor Tower highlighted by Reuters on June 2. That makes it the fastest application in history to reach the figure, doing so roughly three years after its initial launch on iOS and Android in 2023.
Here’s the thing. This happened while public enthusiasm for AI is actually cooling. A Pew Research survey conducted in March 2026 found that half of US adults expressed more concern than excitement about AI’s societal impact. People are using the thing more but trusting it less. That tension is the story.
The growth trajectory that broke every record
To appreciate how absurd this growth is, consider the company’s own recent benchmarks. On February 27, 2026, OpenAI reported approximately 900 million weekly active users.
