Most AI tools wait for you to type. Claude Duet, which Anthropic opened as a research preview yesterday, is built to come to you first. In one early tester's story, it saw a call with a potential client on her calendar, prepared a brief, noticed the call fell right before her flight and offered to move it. Anthropic says it built Duet "for professionals and small business owners with more on their plates than they can track." Here is what it does, who can get it, and how to test it without handing over the keys.
What Claude Duet Is
Duet is an agent: AI that carries out multi-step tasks for you, not just answers questions. It is a separate app from the main Claude app, on iOS, Android and claude.ai, and Anthropic built it around Claude Opus 5.5, the model it launched in September. It carries over your memory, skills and connected apps from your Claude account, so setup is light.
Three things set it apart. Each morning it sends a short brief on the most important items across your connected apps. It checks those apps every few hours and messages you only when something needs you. And it keeps working when you put your phone down, because it has a virtual machine with its own browser: a computer that runs apart from your devices, so your laptop and phone do not need to be on.
Who Can Get It
Access is by waitlist, starting with US subscribers on Claude's Pro and Max plans. During the preview, Duet is included in those plans and shares their usage limits, the cap on how much Claude work your plan covers in a given period. A research preview is an early version that Anthropic is still testing and changing.
Where Your Approval Comes In
Duet reads, drafts and prepares work on its own. But before it sends a message, makes a payment, signs a document or deletes anything, Anthropic says it "shows you exactly what it's about to do and waits for your approval."
Some actions, like trading securities or moving money between accounts, are off-limits even with your approval.
For purchases it uses Link, Stripe's digital wallet: Link asks you to approve the spend, then pays with a virtual card so your real card number is not shared. A dedicated classifier, a filter that checks each message, is designed to block sharing of credit card numbers and government ID. Health and personal finance details go out only when you have explicitly told Duet to send them.
What to Try First
Duet can use the more than 6,000 connectors and plugins in the Claude Marketplace, add-ons that link Claude to software like Gmail, QuickBooks, Stripe, Gusto and Shopify. Start with chores that are annoying but low-risk:
- The morning brief. Connect email and calendar only, and check whether its picks match yours. Anthropic says that for one real estate broker, it flagged a property showing that was on her calendar for the wrong day, without being asked.
- Unpaid invoices. Anthropic says it can check QuickBooks or Stripe for unpaid invoices and draft reminders. Read every draft before you approve it.
- Meeting prep. Ask for a one-page brief before your next client call.
Hold off on payroll, contracts and purchases until you have watched its judgment for a few weeks.
The Limits of a Preview
Anthropic is unusually direct about the rough edges. Duet "still might misread a thread or miscalibrate what's urgent." Personal errands like booking tickets are weaker than work tasks, and it cannot yet show you its browser. Its background checks and bigger tasks, like building a financial model, count toward your plan's limits, so a busy Duet can leave less room for your regular Claude chats. Anthropic also says it is "continuing to develop and strengthen" its privacy protections.
For a small business, that adds up to worth testing, not yet worth depending on. If Duet misjudges an urgent customer email, you still own the miss. In May I wrote about the shift to proactive AI assistants; Duet is Anthropic's clearest move in that direction, and it is aimed squarely at owners.
What to Do Now
If you are on Pro or Max in the US, join the waitlist. When you get in, connect two or three apps, not everything. Tell Duet what you want to hear about and how often. Review every approval closely for the first month, and disconnect any app you are not using.
Choosing which apps to connect, and what to keep off-limits, is the core of our AI tool setup work.
Sources
- Anthropic, "Introducing Claude Duet" (October 21, 2026): features, approvals, safeguards, connectors, limits and eligibility. claude.com
- Internet Archive, snapshot of "Introducing Claude Duet" (October 21, 2026): the launch-day text, including US Pro and Max eligibility. web.archive.org
- Anthropic Help Center, "Release notes" (October 21, 2026): research preview opened for Pro and Max plans. support.claude.com
- Anthropic, "Introducing Claude Opus 5.5" (September 22, 2026): the model Duet is built around. anthropic.com
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