AI Chatbot Market Share March 2026: Claude Is the Dark Horse Every GEO Strategist Is Ignoring
Every GEO practitioner optimizes for ChatGPT. Most add Perplexity. Some throw in Gemini. Almost nobody prioritizes Claude. That’s a mistake, and the March 2026 market share data explains why. First Page Sage released its latest U.S. AI chatbot market share report on March 23, 2026, and while ChatGPT’s 60.4% dominance gets the headline, the growth rates tell a far more interesting story for optimization strategy. The Full Market Share Picture Rank AI Chatbot Market Share Quarterly Growth Key Models 1 ChatGPT 60.4% 4% ▲ GPT-5.2, GPT-5, GPT-4.1 2 Google Gemini 15.2% 12% ▲ Gemini 3 family 3 Microsoft Copilot 12.9% 3% ▲ GPT-5.2, Prometheus 4 Perplexity 5.8% 4% ▲ Sonar, Sonar Pro 5 Claude AI 4.5% 14% ▲ Sonnet 4.5, Haiku 4.5, Opus 4 6 Grok 0.6% 4% ▲ Grok 4.1 7 DeepSeek 0.2% 7% ▲ V3.2, R1 Source: First Page Sage, March 2026 ...