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Within days of each other, both labs shipped the same idea.
Anthropic put Cowork on the web and your phone.
OpenAI launched ChatGPT Work.
Both do the same headline thing. You hand over a job, the AI works across your tools for hours, and hands back finished work.
So which one should you actually use?
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Okay, the honest comparison.
ChatGPT Work.
It lives inside ChatGPT, in agent mode from the tools dropdown, on Pro, Plus, and Team.
You give it an outcome. It gathers across your apps, breaks the project into steps, and works for hours.
Its output is polished deliverables. Spreadsheets, slides, documents, even small web apps. That's its edge. It ships things that look finished.
It also has a Plan mode: it shows you its plan, you approve it, then it goes. Plus check-ins and action approvals, so you decide how much rope it gets.
Claude Cowork.
It lives in the Claude app on paid plans, and now on web and mobile too.
You hand it a job and it works across your files, calendar, email, messaging, and the web until it's done.
Its edge is working inside your actual stuff. Your folders, your real documents, your connected tools. Less about producing a shiny deck, more about doing the operational work you genuinely have.
And the tell: of 1.2 million Cowork sessions, more than 90% were business operations and content, not code. Real work.
So, the call.
Pick ChatGPT Work if you mostly need finished artifacts. Decks, sheets, reports, a quick web app. It is very good at producing the thing.
Pick Claude Cowork if you mostly need work done inside your existing files and tools. Especially if you want it running in the background while you're away.
And if you already pay for one, start there. The overlap is big enough that a second subscription is rarely worth it.
Which one you use matters far less than whether you learn to brief it properly.
That's the part nobody is selling you.
The brief is the skill. A good brief on either tool beats a lazy brief on both.
That skill, plus the Claude setup that makes it run, is Claude Mastery.
Step by step, no tech background needed.
Quick one.
Which are you leaning toward? Hit reply and tell me what you'd hand it.
Talk soon,
Zephyr
