Anthropic Opus 5.5 Leads AI Business Spend With 34% Share

Anthropic's Opus 5.5 model currently drives 34% of total business AI spending, though OpenAI is gaining market share among corporate users, according to the latest Ramp AI Index. High-cost models including Opus, Fable, Sol, and Astra collectively command the majority of industry expenditure, while overall AI spending growth has slowed among the largest users, with the top 1% of firms spending $9,568 per employee in September, down 3.1% from a July peak of $9,873.