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Adoption6/day by emailReported
ChatGPT was estimated to have reached 100 million monthly users roughly two months after launch
UBS analysts, citing data from Similarweb, reported that ChatGPT reached 100 million monthly active users by January. This milestone was achieved approximately two months after its launch in November. The study noted that this made ChatGPT the fastest-growing consumer app in internet history.
Verified 2026-07-31
Track with InsiderWhy it matters
It set the pace for how quickly a consumer AI product could find an audience.
The screener · 78 companiesEvery layer of the AI chain, priced dailyHow this was verifiedEvery figure links to the filing it came from
More on Adoption
- Stanford's 2026 AI Index, citing McKinsey's 2025 survey, breaks down AI-agent deployment by business function. Even in IT, the function with the most agent activity, the share of organisations reporting no AI-agent use at all in 2025 was still 69% of organizations report zero AI-agent use in IT, the business function with the heaviest agent activity
- Stanford's 2026 AI Index reports that organizations' use of generative AI specifically, not just AI overall, grew sharply in 2025: the share of organizations that regularly use generative AI in at least one business function reached 79%, up from 71% in 2024
- Stanford's 2026 AI Index compared generative AI's adoption curve after its mass-market debut to that of earlier transformative technologies, and found generative AI reached 53% population adoption within three years, faster than the PC or the internet
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