ChatGPT's global market share drops below 50%, Gemini and Claude quickly approach According to TechCrunch, Sensor Tower's latest "State of AI 2026" report shows that ChatGPT still has the highest monthly active users among global AI assistant applications (about 1.1 billion), but its market share fell below 50% for the first time at the end of May this year, dropping to 46.4%; Google Gemini's share rose to 27.7%, Anthropic Claude rose to 10.3%, and individual shares such as Grok, Perplexity, DeepSeek, Meta AI, etc. were all below 5%. The report points out that OpenAI triggered a wave of uninstallation peaks after signing with the US Department of Defense (DoD), indicating that brand values influence user choices.