Sensor Tower: ChatGPT surpasses 1B monthly active users, fastest ever

Sensor Tower：OpenAI 旗下 ChatGPT 月活已破 10 亿，史上最快

Sensor Tower estimates ChatGPT surpassed 1 billion global monthly active users in May 2025, while Anthropic’s Claude reached 56 million monthly active users in the same period with about 640% year-over-year growth.

Why it matters: HKR-H/K/R all pass: the article adds concrete adoption estimates for ChatGPT and Claude. It stays below P1 because these are third-party usage metrics, not a model or product capability release.