ChatGPT, which appeared to slow earlier this year as Google and Anthropic closed in, has regained growth momentum and maintained a dominant lead in the major artificial intelligence chatbot market, the report showed. It accounted for more than 81 percent of traffic among major AI chatbots, and no rival service topped a 10 percent share.

Business Insider reported on Nov. 9 that growth marketing firm Graphite analysed web and application usage of major AI services using Similarweb data. The analysis found that as of September 2026, ChatGPT accounted for 81.2 percent of global usage sessions among six major AI chatbots. Google’s Gemini and Anthropic’s Claude grew quickly but did not narrow the gap with ChatGPT.

ChatGPT’s growth has also revived. Usage surged in the first half of 2025 and then stagnated for seven months, but has risen again this year. Monthly usage sessions hit a record 61.35 billion in September. That was up 24 percent from a year earlier. ChatGPT’s weekly active users are said to total 1.2 billion.

Rival services also posted strong growth. Claude recorded the fastest growth, with global usage sessions up 1,901 percent over the past year, and Gemini rose 182 percent. The two services started from a relatively small base. In the survey led by Ethan Smith (이선 스미스), chief executive of data-driven growth marketing agency Graphite, ChatGPT still accounted for the biggest share among major services.

ChatGPT’s influence also showed up in referral traffic that sends users to other websites. Global referral traffic driven by AI services to external websites rose 92 percent over the past year, with ChatGPT accounting for 60 percent.

AI features are also spreading quickly in Google search. AI Overview, which provides AI-generated answers in search results, appeared in 62 percent of U.S. searches. AI Mode, an interactive search feature, also grew and recorded 491 million web visits in the United States in August.

By region, AI usage was notably active outside the United States. The United States accounted for 8.8 percent of global AI traffic. Monthly usage sessions across major AI services worldwide totalled 76.0 billion, up 37 percent from a year earlier. The analysis said that as the AI market expands globally, ChatGPT continues to maintain an overwhelming influence.