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By the numbers: the assistant market in May 2026
Same market, very different numbers — depending on what you count.
Sensor Tower's State of AI 2026 (16 June) reports assistant usage share at ChatGPT 46.4%, Gemini 27.7% and Claude 10.3%, using a deduplicated "True Audience" metric across desktop, mobile app and mobile web.
Why other figures float around: Statcounter's web-referral share still reads roughly 77% for ChatGPT, and Similarweb lands near 68% — because they measure traffic and referrals, not deduplicated users. The headline below-50% figure is valid within Sensor Tower's metric specifically.