ChatGPT Market Share Drops Below 50% as Gemini and Claude Gain Users
ChatGPT’s market share has dropped below 50% for the first time. Market share means the slice of all users one product has, compared to the products it competes with. A new report says OpenAI’s ChatGPT now has 46.4% of the world’s AI assistant market. That is a big fall. ChatGPT used to have almost all the users. Now Google’s Gemini and Anthropic’s Claude are winning many of those users.
An AI assistant is a chatbot you type to, or talk to. It answers your questions, writes text, and helps you with work. ChatGPT is still the biggest one by far. But the gap is getting smaller. This matters for the whole tech world.
What the report actually found
ChatGPT fell below half the market in March 2026. By May 2026 it was at 46.4%. Go back a bit, and the change looks even bigger. In December 2025 ChatGPT had 52.8% of the market. In December 2024 it had 65.3%.
So in about 18 months, ChatGPT went from owning about two-thirds of the market to owning less than half. The two rivals taking that space are mostly Gemini and Claude.
Key facts: market share over time
| AI assistant | Dec 2024 share | Dec 2025 share | May 2026 share |
|---|---|---|---|
| ChatGPT (OpenAI) | 65.3% | 52.8% | 46.4% |
| Gemini (Google) | 18.2% | — | 27.7% |
| Claude (Anthropic) | — | 3% | 10.3% |
More users, but a smaller slice
Here is the surprising part. ChatGPT is losing market share even though it still keeps adding new users. The whole market is growing very fast. The rivals are just growing faster.
ChatGPT had 1.11 billion monthly users in May 2026. That is up from 1.05 billion in December 2025. (Monthly users means the number of people who use it at least once in a month.) Gemini grew from 533 million to 662 million monthly users in the same time. Claude grew the most for its size. It went from 60.2 million users in December 2025 to 245 million by May 2026.
| AI assistant | Dec 2025 monthly users | May 2026 monthly users |
|---|---|---|
| ChatGPT | 1.05 billion | 1.11 billion |
| Gemini | 533 million | 662 million |
| Claude | 60.2 million | 245 million |
Why are people switching?
The report gives a few reasons. Gemini gets a big boost from being built into Google’s other tools, like Search, Gmail, and Android phones. When an AI sits inside apps you already use, you try it without even thinking about it.
Claude has built a strong name for work tasks, like writing and coding (writing computer programs). It is also catching up to ChatGPT on user retention. User retention means how many people keep coming back, instead of leaving after one try.
Trust also played a part. The report says OpenAI made a deal with the U.S. Department of Defense (the part of the U.S. government that runs the military) in February 2026. Right after that, many people deleted the app from their phones. This hints that users care about what a company stands for, not just what it can do.
Why it matters (especially for India and founders)
For Indian founders (people who start companies) and product teams, this is good news. When several strong AI models compete, you get more choice and better prices. You are no longer stuck with one company’s rules or costs.
It also shows that even a clear leader can lose ground fast. Two things matter a lot here. One is distribution, which means getting your product in front of users where they already are. The other is trust. These can matter as much as how good the model is. That lesson is true for any startup, not just AI labs. Indian companies building voice and language AI for local users can feel hopeful. The door is open for new names to win users.
FAQ
What is ChatGPT’s current market share?
The report puts ChatGPT at 46.4% of the world’s AI assistant market in May 2026. That is down from 52.8% in December 2025.
Is ChatGPT losing users?
No. ChatGPT still grew to 1.11 billion monthly users in May 2026. It is losing market share because rivals like Gemini and Claude are growing faster.
Which AI assistant is growing fastest?
For its size, Claude grew the fastest. It went from 60.2 million users in December 2025 to 245 million by May 2026.
Why did some users leave ChatGPT?
The report links a jump in app deletions to OpenAI’s February 2026 deal with the U.S. Department of Defense. This suggests that trust and values affect what users choose.
The takeaway
ChatGPT is still the king of AI assistants. But its crown is no longer safe. Falling below 50% market share marks the start of a real three-way race with Gemini and Claude. For users, founders, and India’s own AI builders, more competition usually means more choice and faster progress.
Source: MediaNama
