ChatGPT remains the biggest name in consumer AI chatbots, but its lead is no longer as secure as it once was. OpenAI’s service has reached 1.1 billion monthly active users, yet its market share has slipped below 50% for the first time.
That shift signals a more competitive phase in the chatbot market. Gemini and Claude are growing quickly, and users are increasingly moving between platforms instead of settling on just one.
Market share is falling even as usage keeps rising
In May, ChatGPT accounted for 46.4% of the chatbot market. That still places it in first position, but it is a sharp contrast to the days when it effectively controlled the entire category.
Gemini has emerged as the nearest challenger with a 27.7% share. Claude follows with 10.3%, showing that the market is no longer defined by a single dominant player.
Importantly, ChatGPT is not losing users in absolute terms. The broader chatbot market is expanding, and OpenAI’s product remains the largest service in the category by a wide margin.
Earlier this month, ChatGPT became the first AI chatbot to pass 1 billion monthly active users. Its 1.1 billion monthly active users also make it the fastest-growing online app or service on record.
Competitors are narrowing the gap
Gemini now has 662 million monthly active users, while Claude has reached 245 million. Those figures show that the market is widening rather than simply shifting from one leader to another.
As more users enter the space, they are not all choosing the same chatbot. Switching between bots is becoming more common, which makes it easier for newer rivals to challenge established leaders.
The trend matters because easier switching reduces the advantage of being first. A service that offers a better experience, stronger capabilities, or a more attractive access model can now win attention much faster.
Money is flowing into chatbot apps too
User spending on AI chatbot apps is also climbing quickly. Total spending in the first half of the year reached $4.2 billion, up from $1.83 billion in the first half of last year.
That increase suggests the market is being driven not only by user growth, but also by a greater willingness to pay for premium features and access.
Among the major players, Claude has the highest share of paying users relative to its total audience. About 13% of Claude users are paid subscribers.
That conversion rate is likely helped by aggressive limits on its free plan, which appear to push some users toward paid access sooner.
OpenAI is broadening how it makes money
OpenAI is also increasing the ad load inside ChatGPT. In May, an average of 17% of daily users saw ads.
The company is also using referral links to Target, Walmart, and Costco, indicating a more direct push to expand revenue beyond subscriptions.
That approach makes sense at a moment when ChatGPT is still dominant but no longer unchallenged. With market share declining, deeper monetization of its huge user base could become a key strategy.
At the same time, Gemini and Claude continue to close the gap on both users and monetization. The result is a chatbot market that is entering a more mature and more contested phase.
For users, that means more choice and more reasons to switch platforms. For the industry, it marks the end of an era in which one player could remain almost untouched.