TLDR: OpenAI has experienced a notable decrease in its generative AI chatbot market share, falling from 75% in October to 61% in November 2025. Despite this significant drop, the company maintains its leading position, facing increased competition from rapidly growing rivals like Microsoft’s Copilot, Google’s Gemini, Perplexity, and Claude AI.
OpenAI, a prominent figure in the artificial intelligence landscape, has recently seen a substantial reduction in its market share within the generative AI chatbot sector. Data released by First Page Sage indicates that OpenAI’s share plummeted from 75% in October to 61% by November 7, 2025. This marks the largest monthly decline observed in the search market share for the company, signaling a dynamic shift in the competitive AI environment.
Despite this considerable downturn, OpenAI’s flagship product, ChatGPT (excluding Microsoft’s Copilot), continues to hold the top position in the generative AI chatbot market with a 61% share. However, its growth rate has reportedly slowed. The evolving market is witnessing aggressive gains from other key players. Microsoft’s Copilot now commands a 14.1% market share, demonstrating a 6% quarterly growth. Google’s Gemini is a close contender with 13.4% of the market and an impressive 8% quarterly growth rate.
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Smaller, yet rapidly expanding, platforms are also making their mark. Perplexity holds a 6.4% market share with a 13% quarterly growth, while Claude AI, particularly noted for its business-oriented applications, has secured 3.8% of the market and boasts the highest quarterly growth rate at 14%. This indicates a steady user acquisition among startups for general-purpose AI chatbots. The increasing competition underscores a maturing AI ecosystem where distribution, integration, and user value are becoming critical determinants of success, moving beyond mere model architecture.
