# ChatGPT Becomes Fastest App to Hit 1 Billion Users as Claude Surges in AI Race > Source: > Published: 2026-06-03 14:31:07+00:00 [ChatGPT](https://www.gadgetreview.com/man-uses-chatgpt-to-design-cancer-vaccine-that-saved-his-dogs-life) just shattered every app adoption record by hitting **1 billion** monthly active users in May, [according to Sensor Tower data](https://www.reuters.com/technology/chatgpt-app-hits-1-billion-monthly-active-users-record-time-data-shows-2026-06-02/). The speed is staggering—three years from launch to this milestone, outpacing every platform giant you scroll through daily. TikTok, Instagram, YouTube, Google Maps—none reached billion-user scale this fast. You’re witnessing AI become infrastructure. Those 1 billion users aren’t just trying ChatGPT once; they’re integrating it into work, school, and creative projects like it’s email or messaging. The **900 million** weekly active users[OpenAI reported earlier](https://openai.com/) this year proves sustained engagement, not tourist traffic. ## Claude’s Explosive Growth Challenges ChatGPT’s Dominance *Anthropic’s app grows 640% year-over-year while chipping away at ChatGPT usage time.* The competition is heating up faster than a Tesla charging station on Black Friday. Claude reached **56 million** monthly users with **640%** year-over-year growth, compared to ChatGPT’s **62%** growth rate. Those percentages tell the real story—Claude is expanding from a smaller base at rocket speed. More telling: U.S. ChatGPT users who installed Claude spent **5% less** time on ChatGPT within a month, according to Sensor Tower. That’s early evidence of platform switching, suggesting users aren’t just collecting [AI apps](https://www.gadgetreview.com/ai-powered-websites-you-didnt-know-can-supercharge-your-productivity)—they’re choosing favorites. When you have legitimate alternatives, monopoly becomes harder to maintain. ## IPO Filings Signal AI Industry Maturation *Both OpenAI and Anthropic prepare for public markets with massive user bases as leverage.* Both companies are racing toward IPOs, turning user metrics into investor bait. Anthropic filed confidentially for a U.S. public offering, while Reuters reports [OpenAI](https://www.gadgetreview.com/openai-secretly-funded-child-safety-coalition-pushing-ai-age-laws) is preparing its own filing. ChatGPT’s **50 million** paying subscribers provide a monetization blueprint that investors can actually calculate returns on. This isn’t just about raising capital—it’s about legitimizing AI as a permanent category alongside search, social media, and e-commerce. When billion-user AI platforms go public, they’re betting that conversational interfaces become as essential as web browsers. Based on these adoption numbers, that bet looks increasingly safe.