ChatGPT Web Share Falls to 53.7% as Anthropic Overtakes OpenAI on Ramp Business Adoption

SimilarWeb data showed ChatGPT’s share of global generative AI website traffic fell from 77.6% in May 2025 to 53.7% in April 2026. Ramp AI Index data showed Anthropic reached 34.4% of tracked U.S. businesses, ahead of OpenAI at 32.3% for the first time.

ANTHROPIC-2.65%
OPENAI-0.17%
ON-8.57%
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