launched in november 2022 as a research preview, chatgpt quickly became the fastest app to reach 100 million monthly active users within just two months. by november 2023, it had achieved 100 million weekly active users, climbing to 300 million by december 2024 and 400 million by february 2025.
early adoption of chatgpt was primarily driven by curiosity, with users exploring the app without fully integrating it into their daily routines. however, its more recent surge is attributed to new model releases and enhanced capabilities. the introduction of gpt-4o, which added multimodal features, led to a spike in usage from april to may 2024. additionally, the launch of advanced voice mode boosted engagement between july and august 2024, followed by further growth with the o1 model series in september and october 2024.
on mobile, chatgpt’s user base has grown steadily, with monthly increases ranging from 5% to 15% over the past year. of its 400 million weekly active users, 175 million now access the app via mobile devices.
the report also highlights competition in the ai space, particularly from deepseek, which rapidly secured the no. 2 global spot within 10 days and captured 15% of chatgpt’s mobile user base by february 2025. while deepseek users show slightly higher engagement than those on perplexity and claude, chatgpt remains the dominant player.
additional insights from the report include ai tools for developers, rankings of top ai apps by category and revenue, and an analysis of the leading generative ai apps across web and mobile. chatgpt continues to hold the no. 1 position in both unique monthly web visits and mobile active users, according to data from market intelligence firm similarweb.