Anthropic remained ahead of OpenAI in business AI adoption in July, but new Ramp data suggests OpenAI had an edge in demand for premium models. Ramp's AI Index found Anthropic's Fable 5 generated 75% as much spending as OpenAI's GPT-5.6 Sol during the month, indicating weaker business uptake for Anthropic's most advanced offering despite its broader lead. Across Ramp's base of more than 70,000 U.S. business customers, 43.5% were paying for Anthropic AI products in July, compared with 39.7% for OpenAI. xAI reached 4%, while Google's share slipped to 6.2% from 6.4%. The figures may understate Google's position because some usage is bundled through Google Workspace, Ramp economist Ara Kharazian said. The spending data points to a possible pressure point for Anthropic as it heads toward an IPO: whether customers will keep paying up for top-end AI rather than choosing lower-cost alternatives. Fable 5 also faced a disrupted rollout after a government order temporarily took it down before it returned on July 1 and underwent pricing changes during the month. At the same time, Ramp said AI spending is rising faster than adoption. The top 1% of AI spenders paid a median of $7,400 per employee for AI tools in July, up from less than $5,000 in June, while the median company spent about $12 per employee versus about $11. Kharazian said coding agents (AI systems that autonomously perform software tasks) account for a large share of the spending Ramp tracks and can cause costs to "spiral" because they trigger additional work at scale.