Not long ago, many people saw ChatGPT as the default AI for office work. But the picture changed in May 2026. Ramp’s latest AI Index, based on spending data from more than 50,000 U.S. businesses, said Anthropic passed OpenAI in paid business adoption for the first time in April. Anthropic reached 34.4% of businesses, while OpenAI fell to 32.3%. Ramp also said overall paid AI adoption rose to 50.6%. (ramp.com)
Still, this does not mean ChatGPT has disappeared from the workplace. OpenAI says it now serves more than 7 million ChatGPT workplace seats, and ChatGPT Enterprise seats grew about nine times year over year. So the story is not simply “one winner, one loser.” It is a sign that companies are becoming more careful and more practical about which AI they choose. (cdn.openai.com)
Why are companies changing? One big reason is job fit. Anthropic has pushed Claude as a strong tool for coding and long, complex tasks. In 2025, Anthropic said Claude 4 led the SWE-bench software benchmark. Its Enterprise plan also brings Claude Code and Claude Cowork together under one agreement. Anthropic says the plan includes SSO, SCIM, audit logs, role-based permissions, a larger context window, and GitHub integration. These features are attractive for teams that need both strong performance and strict control. (anthropic.com)
Another reason is trust. OpenAI also offers business privacy and admin tools such as SSO, SCIM, audit logs, and connectors, and says business data is not used for training by default. This shows that companies are no longer choosing AI only by brand name or popularity. They are comparing security, workflow support, and how well a tool matches real work inside the company. (openai.com)
There is a bigger lesson here. OpenAI’s own enterprise report says the main problem for many organizations is no longer model quality, but readiness and implementation. McKinsey’s 2025 global survey also found that 88% of organizations use AI in at least one business function, and the strongest companies are more likely to redesign workflows, not just add a new tool. So the real change is this: businesses are moving from “Which chatbot is famous?” to “Which AI truly helps us work better?” (openai.com)










