AI TRENDS | ChatGPT's Global Traffic Share Declines as Anthropic Surpasses OpenAI in U.S. Business Adoption

According to SimilarWeb data, ChatGPT's share of global generative AI website traffic decreased significantly from 77.6% in May 2025 to 53.7% in April 2026. This decline highlights a shift in the generative AI landscape. According to NS3.AI, Ramp AI Index data further revealed that Anthropic has surpassed OpenAI in U.S. business adoption for the first time, with Anthropic reaching 34.4% of tracked businesses compared to OpenAI's 32.3%. This development marks a notable change in the competitive dynamics among leading AI platforms.