ChatGPT Share Falls to 46.4% as Gemini and Claude Gain Ground
Updated
Updated · TechCrunch · Jun 16
ChatGPT Share Falls to 46.4% as Gemini and Claude Gain Ground
1 articles · Updated · TechCrunch · Jun 16
Summary
ChatGPT’s global AI-assistant share slipped below 50% for the first time, falling to 46.4% by the end of May even as it remained the largest service with more than 1.1 billion monthly users.
Gemini and Claude drove most of that erosion, reaching 27.7% and 10.3% market share, while Sensor Tower said users are increasingly willing to switch among assistants.
Specific events can accelerate churn: OpenAI’s February deal with the U.S. Defense Department triggered a measurable spike in ChatGPT uninstalls, suggesting brand trust matters alongside product features.
The broader market is still expanding but maturing, with H1 2026 app downloads on pace for nearly 2.3 billion and spending above $4.2 billion, while growth rates for both have slowed.
Monetization is becoming a sharper differentiator: Claude leads subscription conversion at 13% of users, and ChatGPT had expanded ads to an average 17% of daily users by May.
How did Anthropic become more valuable than OpenAI with a billion fewer users?
As ads infiltrate AI chats, how can you tell an answer from an advertisement?
With AI directing shoppers, what must brands do to survive when search rankings no longer matter?
AI Assistant Market Share 2026: ChatGPT Faces Rising Competition from Gemini, Claude, and Specialized Rivals
Overview
The AI chatbot market is rapidly evolving and highly competitive as of May 2026. OpenAI's ChatGPT remains the leader, holding 54.7% of global web visits and seeing strong growth in U.S. desktop users. However, its dominance is being challenged by fast-growing rivals like Google's Gemini and Anthropic's Claude, which are gaining significant market share. To adapt, OpenAI has started serving ads to 17% of ChatGPT's daily users, moving beyond just subscriptions. This shift highlights how leading platforms are changing their strategies to maintain growth and revenue in a dynamic and fragmented market.