The AI Balance Is Shifting: ChatGPT's Market Share Falls Below 50 Percent for the First Time
Originally published in Turkish. Read the original →
ChatGPT, the pioneer of the AI revolution, has dropped below 50% market share for the first time due to growing competition and user migration. According to Sensor Tower data, ChatGPT keeps the lead with a 46.4% share, while Gemini at 27.7% and Claude at 10.3% are closing the gap.
ChatGPT, which kicked off the AI craze and long held the industry in its hands alone, now faces much tougher rivals. As users look for alternatives and the market matures, ChatGPT's market share has fallen below the 50 percent mark for the first time since its launch.
This shows that the unipolar era of the AI ecosystem is over and the multi-model era has officially begun.
The Sensor Tower Report: The AI Market in Numbers
The latest market report published by analytics firm Sensor Tower confirms that users' interest in alternative models is growing. According to the report, the current distribution of the AI market and monthly active user counts look like this:
| AI Model | Monthly Active Users | Market Share (%) |
|---|---|---|
| ChatGPT (OpenAI) | 1.1 Billion | 46.4% |
| Gemini (Google) | 662 Million | 27.7% |
| Claude (Anthropic) | 245 Million | 10.3% |
| Other (Grok, Perplexity, DeepSeek, etc.) | - | 15.6% |
The Main Reasons Behind the User Migration
ChatGPT's loss of users is driven not only by the technological progress of alternative models but also by changes in company policy. The Sensor Tower report notes that users are far more inclined to switch between models than before.
- In particular, some of OpenAI's recent strategic moves drew serious backlash from its user base:
- The Pentagon Deal: OpenAI's military and cybersecurity-focused agreements with the US Department of Defense (Pentagon) led a large group of users with ethical concerns to leave the platform.
- Political Rapprochement: Discomfort with the company's close collaboration with the Trump administration and the profit-driven transformation of its corporate structure pushed users toward Claude, the model from Anthropic, which is known for its more transparent and safety-focused stance.
The Multi-Model Era: Switching Is Now Very Easy
Developers and individual users no longer feel obliged to stay loyal to a single AI model. The standardization of API integrations, the similarity of interfaces and third-party platforms (Cursor, Poe, etc.) that allow using multiple models at once have brought the cost of switching between alternatives down to almost zero.
As a result, the breaking of ChatGPT's absolute hegemony opens the way for healthier competition in the AI market. This will force companies to be more innovative in both their pricing policies and model performance.
