Anthropic's enterprise AI adoption rate surpasses OpenAI, with Claude leading with a 34.4% share.

According to Mars Finance, a report released on May 15th, based on enterprise AI usage data, shows that Anthropic's enterprise AI adoption rate reached 34.4% in April 2026, surpassing OpenAI's 32.3% for the first time, making it the leading generative AI provider in the enterprise market. Data shows that the overall US enterprise AI adoption rate has risen to 50.6%, with enterprises rapidly increasing their reliance on large model tools. The Claude model processes over 25 billion API calls per month, with approximately 45% coming from enterprise users. The report points out that Anthropic's growth is primarily driven by its strong products in software development and document-intensive workflows (such as Claude Code), with high penetration rates in industries such as finance, law, and R&D. Meanwhile, over 70% of Fortune 100 companies have already integrated Claude-related tools to some extent, driving its large-scale application in enterprise scenarios. Analysts believe that the enterprise AI market is shifting from a "brand-driven phase" to a "performance and cost-driven multi-vendor competitive landscape," with declining model switching costs leading to increased market share volatility. However, the data also shows that competition remains highly dynamic, with companies rapidly responding to changes in price, performance, and stability when choosing models, meaning leading advantages can be reversed in the short term.