ChatGPT's AI Assistant Market Share Falls Below 50% for the First Time

TechCrunch·medium signal

Sensor Tower's 'State of AI 2026' report, released June 16, shows ChatGPT's share of global AI assistant users fell to 46.4% by end of May — down from 52.8% in December 2025 and 65.3% in December 2024. Gemini rose to 27.7% and Claude to 10.3%, though ChatGPT still leads on absolute scale with 1.1B+ monthly users vs Gemini's 662M and Claude's 245M.