In a record-breaking surge, ChatGPT, the AI-powered chatbot developed by OpenAI, has hit an estimated 100 million monthly active users in January—just two months after its public launch. According to a UBS report released Wednesday, this makes ChatGPT the fastest-growing consumer application in history.

Citing data from analytics firm Similarweb, the report noted that ChatGPT averaged around 13 million unique daily visitors in January, more than doubling its December numbers. “In our two decades of tracking the internet space, we’ve never seen a consumer internet app scale this quickly,” UBS analysts stated.

For comparison, TikTok took nine months to reach the same milestone after its global debut, while Instagram needed two and a half years, according to Sensor Tower data.

Launched for free in late November and backed by Microsoft, ChatGPT can produce essays, articles, jokes, and poetry in response to user prompts. On Thursday, OpenAI announced a $20 monthly subscription plan for U.S. users, offering enhanced speed, stability, and early access to new features.

The rapid uptake of the chatbot is expected to give OpenAI a significant edge in the AI race. While high user demand has led to soaring computing costs, the feedback collected is playing a crucial role in refining the model’s responses. OpenAI said the new subscription revenue will help offset these operational expenses.

However, the widespread use of ChatGPT has also sparked concerns about academic dishonesty and the spread of misinformation. Despite this, investor confidence remains strong, with Microsoft recently committing a multi-billion-dollar investment in OpenAI, including both cash and cloud infrastructure support.