OpenAI closes gap with Anthropic among US business spenders, Ramp data

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Spending data from Ramp’s corporate card and bill-pay platform, covering more than 70,000 American businesses, shows OpenAI currently growing faster than Anthropic among business customers in the third quarter to date, even as Anthropic retains the overall lead.

Anthropic first overtook OpenAI in May, when it hit 41% market share against OpenAI’s 39% among Ramp’s paying business users. By July the gap had widened: Anthropic held nearly 44% to OpenAI’s nearly 40%. Ramp economist Ara Kharazian attributed part of OpenAI’s recent momentum to GPT-5.6 Sol.

“GPT-5.6 Sol is really good, increasingly the choice for developers.”

He also noted that Anthropic’s higher-end Fable model tier “disappointed both in adoption and real-world application given price + data retention requirements imposed by regulators.” Anthropic drew criticism after warning Fable users it must retain their data for 30 days.

The broader market is expanding regardless of which company leads. The share of Ramp-tracked businesses paying for AI at all topped 50% in March and reached nearly 56% by July. Ramp declined to share actual dollar figures, and the data skews toward tech-industry companies and excludes large enterprises using spend-management tools from providers such as American Express.

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