Anthropic leads the AI race at work. Its priciest model is another story.

Anthropic CEO Dario Amodei. Bloomberg/Getty Images Anthropic is still leading OpenAI in business adoption, per Ramp's July AI Index. OpenAI's GPT-5.6 Sol was more popular than Anthropic's Fable 5 AI model in July, in Ramp's data. The rivals have poured effort into winning businesses over to AI agents, which drive spending. 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…