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ChatGPT hits 1B monthly users in record time
03 Jun 2026

OpenAI's ChatGPT has set a new record by becoming the first app to cross one billion monthly active users (MAUs) in just three years.

The milestone was achieved in May 2026, according to data from market intelligence firm Sensor Tower.

The achievement shows how quickly artificial intelligence has gone from being a niche technology to a mainstream tool.

ChatGPT's growth compared to other platforms
Rapid expansion

ChatGPT's user base has grown faster than other popular platforms such as TikTok and Instagram.

While TikTok took five years to reach the same milestone, Instagram took nearly eight years.

The rapid adoption of ChatGPT highlights its potential in the generative AI space and its ability to capture consumer interest at an unprecedented rate.

Rising competition in AI app market
Market rivalry

Despite its dominance, ChatGPT isn't without competition. Anthropic's Claude app has managed to garner 56 million MAUs with an impressive 640% year-over-year growth rate.

In comparison, ChatGPT's growth rate stands at a more modest 62%.

The data also shows that US users who installed Claude spent 5% less time on ChatGPT after a month, indicating rising competition in the AI app market.

Implications for upcoming IPOs
IPO plans

The billion-user milestone comes as both OpenAI and Anthropic gear up for public listings.

While Anthropic has already confidentially filed for a US IPO, OpenAI is expected to announce its own IPO in the coming weeks.

The achievement further cements OpenAI's position as it heads into what could be one of the most closely watched tech IPOs of this decade.