- ChatGPT’s market share falls to 46.4% as Gemini climbs to 27.7%
- Department of War deal saw a spike in ChatGPT uninstalls
- Google’s ecosystem is a major Gemini advantage
New figures have claimed ChatGPT’s share of the global AI assistant market is under pressure after it dropped below 50% for the first time since its launch in the face of stiff competition from other rivals.
Even though ChatGPT has lost market share by means of proportion, it remains a clear leader with more than 1.1 billion monthly active users, making it the world’s largest assistant by a significant margin.
However, Gemini is rising up the charts, accounting for 27.7% of the market in May 2026 compared with 46.4% for ChatGPT.
ChatGPT is still the leader, but Gemini is chasing it in second place
The data comes from Sensor Tower, which observed considerable recent growth among Claude users. Though Anthropic’s chatbot still only accounts for 10.3% of the market. Grok, Perplexity, DeepSeek and Meta AI all have much smaller shares.
“Claude has experienced explosive growth, led by a strong web presence, and its True Audience share in the US has more than tripled,” the company added.
Time spent on GenAI apps has also more than doubled in one year, from 17.2 billion hours in the first half of 2025 to 36 billion hours in the first half of 2026.
Conversely, the company also warned that ChatGPT uninstalls had surged following the company’s agreement with the Department of War, marking poor consumer trust. Uninstalls have since fallen closer to the average.
Overall, the data shows that consumers haven’t been tied to specific chatbots for long enough to have any extreme loyalties. Instead, they’re more prepared to migrate based on model capabilities and releases, ecosystem and third-party integrations, pricing and even company politics.
As for Google‘s growing market share, its ties to the broader Google ecosystem is a huge advantage, with integrations spanning Android, Search, Workspace, Health and more.
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