Although OpenAI still straggles behind Anthropic in a closely watched measure of AI adoption among businesses, there’s a spark of hope for CEO Sam Altman’s company.

OpenAI has an advantage over its rival’s priciest and most advanced model, according to new data from Ramp’s AI Index. The data shows that Anthropic’s Fable 5 model generated 75% as much spend as OpenAI’s GPT-5.6 Sol model did in July, indicating that Anthropic’s top model was less popular among businesses. As Anthropic retains its lead in business adoption, weaker demand for top-end AI could ring alarm bells about customers’ spending restraint.

Ramp, a financial technology firm…