Since GPT-5.6 Sol launched in early July, OpenAI says revenue is up 35 percent this quarter, with enterprise revenue growing more than 50 percent. Ramp data shows OpenAI outpacing Anthropic in business API spending for the first time after Anthropic had overtaken OpenAI in quarterly revenue.

OpenAI's 82% Q3 enterprise growth outpaces Anthropic's 76%, driven by GPT-5.6 Sol's strong benchmarks and Claude Fable 5's regulatory suspension.

Businesses are willing to flop back and forth as each lab releases new models, volatility that should give both companies' investors pause about how "sticky" enterprise AI…