OpenAI concedes ChatGPT growth slowdown as Gemini reaches 1 billion users

OpenAI called ChatGPT's climb from 900 million to 1 billion weekly active users over five months a slowdown — a rare admission that adoption may be flattening. Google's Gemini hit 1 billion monthly users the same week, up from 400 million in roughly a year. The figures are not directly comparable: Gemini's count includes Android preinstalls.