According to market intelligence firm Sensor Tower, ChatGPT reached the milestone last month, roughly three years after launching, Reuters reports. It apparently passed 1 billion MAUs faster than the other apps that have hit the benchmark, including Google Maps, TikTok, Instagram, and YouTube. [Link: ChatGPT app hits 1 billion monthly active users in record time, data shows | https://www.reuters.com/technology/chatgpt-app-hits-1-billion-monthly-active-users-record-time-data-shows-2026-06-02/ | Reuters]