OpenAI launched ChatGPT Work in July 2026 as a direct response to Anthropic’s Claude Cowork, which launched earlier this year. Both products target the same market: enterprise customers who want AI to handle multi-step tasks autonomously without human intervention at each step.

Anthropic’s revenue run-rate has exceeded $47 billion annualized, outpacing OpenAI’s estimated $25 to $33 billion. ChatGPT’s monthly visitors dropped below a majority of the generative AI market for the first time in May 2026. Both facts signal OpenAI is losing enterprise ground to Anthropic.

What Are These Products?

Claude Cowork and ChatGPT Work do similar things: they take instructions from users and execute multi-step workflows autonomously. Instead of asking an AI each step of a process, you describe the end goal and the system figures out how to get there using the apps already connected to your account.

For enterprise, this is meaningful. It reduces the manual prompt engineering that slows down AI adoption. It turns AI from a tool you use into an agent that works for you.

Anthropic’s Advantage

Anthropic got there first with Cowork in January 2026. The company also has stronger enterprise relationships through its AWS partnership and is actively negotiating custom chip deals with Samsung. Fable 5, Anthropic’s latest model, was offline briefly due to US export controls but is now fully restored.

The fact that Anthropic’s revenue is already outpacing OpenAI despite being a younger company suggests enterprise customers are genuinely preferring Claude and willing to abandon ChatGPT.

The Larger War

Both companies are preparing for public offerings. They’re fighting for enterprise revenue because consumer revenue is saturating. The winner in this space will likely be the company that can make AI agents reliable enough for businesses to stake real money on them.

OpenAI is also facing pressure from Google, which launched Gemini Enterprise at Cloud Next in June. Google has the advantage of being already embedded in enterprise workflows—Gmail, Sheets, Drive, Meet—which means tighter integration for workflow automation.

The real competition isn’t about ChatGPT vs Claude in consumer consciousness. It’s about which company can build the most trustworthy agent that enterprises will let run processes without oversight.