The milestone, reached around September–October 2025, highlights OpenAI’s widening dominance in the generative AI market and positions the platform to potentially reach one billion users by the end of the year. ChatGPT  has surpassed an estimated 800 million weekly active users, marking one of the fastest adoption surges in the history of consumer technology. The milestone, reached around September–October 2025, highlights OpenAI’s widening dominance in the generative AI market and positions the...