Anthropic CEO Dario Amodei. Bloomberg/Getty ImagesAnthropic 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…This story appeared on businessinsider.com , 2026-08-12 14:00:01.