ChatGPT market share falls below 50% for first time
Original: ChatGPT’s market share slips below 50% for first time
Why This Matters
Marks major shift in AI assistant market competition, ending ChatGPT's market dominance and signaling industry maturation toward monetization over growth.
ChatGPT's global market share dropped below 50% for the first time, falling to 46.4% by May 2026, as users shift to competitors like Google Gemini (27.7%), Anthropic Claude (10.3%), and others, despite maintaining 1.1 billion monthly users.
More than three and a half years after its launch, ChatGPT's dominance in the AI assistant market is declining for the first time, according to Sensor Tower's State of AI Report for 2026. While ChatGPT remains the most popular AI assistant globally with over 1.1 billion monthly users, its market share fell from over 50% in January to 46.4% by May 2026. Google's Gemini has captured 27.7% market share with 662 million monthly users, while Anthropic's Claude holds 10.3% with 245 million users. Other competitors including Grok, Perplexity, DeepSeek, and Meta AI each hold less than 5% market share. The report indicates users are increasingly willing to switch between assistants, with specific events driving migrations. OpenAI's February deal with the U.S. Department of Defense triggered a measurable spike in uninstalls, suggesting users prioritize brand values alignment alongside features. Gemini's growth is largely attributed to integration with Google's ecosystem, while Claude has gained strong adoption for productivity use cases and is approaching ChatGPT's user retention rates. In the first half of 2026, the AI app industry is projected to reach 2.3 billion downloads and $4.2 billion in spending, compared to $1.83 billion in H1 2025—a 129% year-over-year increase. However, download and spending growth rates have decelerated, indicating market maturation. Asia experienced its first regional download decline of 3.3% in Q1 2026, while North America and Europe show higher in-app spending levels. Notably, Claude leads in monetization with 13% of its users on paid subscription plans.