Ramp: Anthropic accounts for 43.8% of the paid share of AI in American enterprises
On September 9, Ara Kharazian, Chief Economist of the corporate spending management platform Ramp, released the Ramp AI Index for September 2026. This index tracks the AI usage of U.S. enterprises based on Ramp's spending data. In August, Anthropic held a share of 43.8% among U.S. enterprises paying for subscriptions or tokens, an increase of 0.34 percentage points month-over-month; OpenAI accounted for 39.8%, with a month-over-month increase of 0.09 percentage points. Overall, the adoption of AI continues to grow, but the growth rate is slowing, with technology sectors such as information, finance, and professional services leading.The median monthly AI spending per capita for the top 1% of enterprises decreased by 9.7%, from $7,976 to $7,205. The effective price per million tokens dropped by 41% from the peak of $1.15 in March 2026 to $0.68. The usage is driven by cheaper standard models, with cutting-edge models (Opus, Fable, Sol) accounting for 45% of the token share. The adoption of open-source models remains limited, representing 6.4% of AI spending enterprises and 3.6% of all enterprises.