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]

June 2 : OpenAI's ChatGPT has crossed 1 billion global monthly active app users, becoming the fastest app ever to reach the milestone, according to estimates from market…

ChatGPT hit 1 billion monthly users in three years as Anthropic's faster-growing Claude ramps up competition ahead of potential IPOs.

ChatGPT atinge 1 bilhão de usuários ativos mensais, diz Sensor Tower