Anthropic's Fable 5, considered the most capable AI model on the market, is seeing slow adoption among U.S. companies, according to spending data from financial services provider Ramp. In its first month after launch, Fable 5 accounted for only about six percent of tokens purchased from Anthropic and 11.4 percent of total spending on Anthropic models. By comparison, OpenAI's GPT-5.6 Sol captures 25 percent of tokens and 23 percent of spending at OpenAI. Fable 5 brought in only about 75 percent of the model-related revenue that GPT-5.6 Sol generated, despite costing significantly more per token. Ramp economist Ara Kharazian attributes the slow uptake to price, as Fable 5 costs about $10 per million input tokens and $50 per million output tokens, roughly twice as expensive as GPT-5.6 Sol. He sees this as a ceiling on corporate willingness to spend on AI, arguing the extra performance isn't worth the cost. Ramp notes its sample skews slightly toward tech companies, so actual adoption may be lower. Growth at OpenAI and Anthropic is decelerating: 43.5 percent of U.S. companies paid for Anthropic subscriptions or tokens in July, up 1.1 percentage points, while OpenAI reached 39.7 percent but grew by only 0.23 percentage points. xAI rose 0.94 percentage points to 4 percent. Advanced users