OpenAI appears to be gaining momentum against Anthropic among US business customers, although Anthropic remains ahead in overall adoption, according to spending data from corporate finance platform Ramp.

Ramp's July figures showed 43.5% of businesses in its dataset paying for Anthropic products, compared with 39.7% for OpenAI. Anthropic increased its share by 1.1 percentage points during the month, while OpenAI gained 0.23 percentage points.

More recent third-quarter data shared with TechCrunch, however, indicated that OpenAI was growing faster than Anthropic among the businesses tracked by Ramp. The trend could still change before the quarter ends.

Ramp's data covers tens of thousands of US businesses using its corporate cards and bill-payment services. The sample has a relatively strong technology-sector presence and does not represent the entire enterprise market, particularly very large corporations using other expense-management systems.

The figures also suggest that corporate spending on artificial intelligence remains widespread. Nearly 56% of Ramp customers were paying for AI products by July, according to TechCrunch.

The shifting figures highlight intense competition between AI laboratories for business customers, with companies apparently willing to move spending between providers as new models, pricing and data policies emerge.