Anthropic opened a research preview of Claude Duet on October 21, 2026. It's an agent that doesn't wait for you to type. It reads the apps you connect, sends you a brief every morning, checks in every few hours, and works through bigger jobs on its own cloud computer while your laptop is shut.

Most of the coverage so far lines it up against ChatGPT Dots and Meta Muse. This post is for a narrower reader: someone running a digital agency, where the work clients pay for is wrapped in a lot of work nobody pays for.

Here's our view up front. The best agency use of Duet isn't making more deliverables. It's the work around them: noticing the client who's gone quiet, chasing the invoice, prepping the call, catching the "quick extra page" that isn't in the SOW. Treat Duet like a sharp junior account manager who reads everything and sends nothing without you, and it earns its keep in the first week. Treat it like a production tool, and mostly you'll get more drafts to review.

Below you'll find what Duet is, what it will and won't do without asking, 10 agency use cases with our verdict on each, and a checklist to get ready before your invite arrives. The four panels are interactive, so click around.

What is Claude Duet?

Claude Duet is a proactive agent from Anthropic. Instead of answering when you ask, it watches the apps you connect, tells you what needs your attention, and does the legwork you hand it in the background. Anthropic aimed it at professionals and small business owners who have more on their plates than they can track, which describes almost every agency owner we know.

What's confirmed so far:

It runs on Claude Opus 5.5 and lives in its own app, separate from the main Claude app: iOS, Android, and claude.ai on a computer.
A morning brief. A short summary of what matters across your connected apps, with first drafts of the next steps.
Check-ins every few hours. It messages you only when something needs you, and you choose what you hear about and how often.
One thread. You talk to it by typing or by voice, whether it's a two-minute question or a week-long project.
Its own cloud computer. Bigger jobs run on a virtual machine with its own browser, so your devices can be off. It messages you when the work is done or needs a decision.
Your Claude setup comes with it. Memory, skills and connected apps carry over from your Claude account, and it can use the 6,000+ connectors and plugins in the Claude Marketplace.
Approvals. It reads, drafts and prepares work on its own. Before it sends a message, makes a payment, signs a document or deletes anything, it shows you the exact action and waits.

Who can get it: access is by waitlist, starting with Claude Pro and Max subscribers in the US. Team and Enterprise plans aren't included yet. There's no extra charge, but Duet shares your plan's usage limits, and its background check-ins count toward them.

Here's what that looks like across one day at a made-up 12-person agency. Press play, or click any moment.

Green moments Duet handles alone. Copper ones wait for you. Blue is you handing it work.

Claude Duet vs. ChatGPT Dots, Meta Muse and Claude Cowork

Duet is the third always-on agent in five weeks, and the three point in different directions:

Meta Muse arrived in September and leans consumer: everyday tasks, purchases and travel, reachable through its own app or WhatsApp, with a free way in.
ChatGPT Dots launched on September 29. It works between conversations, lives in ChatGPT, Slack and Teams, and starts on the $100-a-month Pro plan.
Claude Duet is the most business-shaped of the three. The examples Anthropic named are unpaid invoices in QuickBooks and Stripe, payroll prep in Gusto, agreements in Docusign, follow-ups from HubSpot and Shopify stores.

Then there's Claude Cowork, which plenty of agencies already use. In Cowork you hand Claude a task and it works on it. Since October 6, new Cowork tasks on Pro and Max plans run on Anthropic's servers too, so working in the cloud isn't what sets Duet apart. Noticing is: Duet finds the work before you ask. (New to Cowork? Start with what Claude Cowork is.)

For an agency, the noticing is the product. Most agency fires don't start with "we couldn't make the deck". They start with "nobody saw the client's email on Friday."

Will Duet ask before it acts?

Yes, for anything that leaves your hands. Anthropic draws three lines:

Does it alone: reading your connected apps, researching, drafting and preparing work.
Asks you first: sending a message, making a payment, signing a document or deleting anything. It shows you the exact action and waits.
Never, even with your approval: trading securities and moving money between accounts.

Purchases go through Link, Stripe's wallet, with a virtual card so your real card number isn't shared, and Shopify's Shop Pay works too. Duet doesn't see your passwords or sign-in tokens. A dedicated classifier rejects the most sensitive data, such as card numbers and government IDs, and Anthropic ran red teams and an outside penetration test before launch.

Think you know where the lines fall? Nine actions, three choices:

Our view: the approval gate isn't a limit on Duet. It's what makes it safe for agency work. Agencies live and die by what reaches the client. A tool that drafts everything and sends nothing without you fits how account work already runs: the junior drafts, the senior sends.

10 ways a digital agency can use Claude Duet

We scored ten agency jobs on two things: how much time each gives back, and how much it hurts if Duet gets it wrong. Six are worth handing over on day one. Four are worth it after a month, once you've seen how Duet reads your clients. Click a dot to see what you'd tell Duet, which apps it needs and what to watch.

Day one

1. Morning client radar. The morning brief, pointed at your clients. Ask Duet for every client who needs you today: emails unanswered for 48 hours, approvals you're waiting on, meetings that clash. It drafts the replies and you send them. This is what Duet was made for, and it will make an agency owner look more responsive than their own team.

2. Pre-call briefs. An hour before each external call, a one-page brief lands in your thread: who's on the call, deal stage, the last three emails, open asks, and the question they'll probably ask. One of Anthropic's early users, a brand strategist, had Duet prepare a client-call brief, and it noticed the call sat right before her flight and offered to move it. That's the whole pitch in one story.

3. Follow-ups on stalled threads. Approvals stall, assets don't arrive, feedback goes quiet. Ask Duet to watch for anything that's been waiting more than three working days and draft a nudge in your voice. Write your tone down once, as a memory or a skill, and the nudges stop sounding like a reminder bot.

4. Chasing unpaid invoices. Anthropic's own example, and the easiest money on this list. Connect QuickBooks or Stripe, and every Monday Duet lists what's late and drafts reminders, friendly at 14 days and firmer at 30. Each one waits for your OK. Tell it who's on a payment plan, so it doesn't chase a client you've agreed terms with.

5. New-business research and first-draft proposals. When a lead lands in HubSpot, Duet researches the company in its own browser, drafts a discovery-call brief, and starts a proposal from your template in Drive. When you win, it can get the Docusign agreement ready, and signing still waits for you. Pricing and scope stay yours. Our guide to client proposals in Claude covers the template side.

6. Overnight prototypes for pitches. Before you log off, describe the prototype you want for tomorrow's pitch. Duet works through it on its cloud computer while your laptop is closed, and in the morning you review it alongside a list of what it assumed. Keep this internal at first. A prototype that reaches a client unreviewed is a promise you didn't make.

After a month

7. Weekly client reports. The biggest payoff on the list, and the one we'd hold back. Duet can pull the week's numbers from your connected apps, draft the report in your template and flag anything that moved more than 10%. But numbers that reach a client have to be right. Run it next to your current process for a month, and switch over once its figures match yours four weeks running. Our weekly reporting workflow shows the format we'd start from.

8. Scope-creep alerts. Point Duet at your shared client channels and your SOWs, and ask it to flag requests that fall outside scope and draft a change order. Hugely valuable, but Anthropic says this early version can misread a thread, and a wrong "that's out of scope" email costs more than the extra work would have. Keep the alerts to yourself until its calls match yours.

9. Client onboarding checklists. Anthropic's demo shows Duet running a 41-item opening checklist for a café, with one $640 permit waiting for the owner's OK. An agency onboarding has the same shape: kickoff, access requests, contract, first invoice, welcome pack. It's a lot of client-facing steps in the week first impressions are made, so get used to Duet's approvals on internal work first.

10. Hiring and freelancer admin. Duet can draft a LinkedIn job post (published only after you approve it), book interviews into your free slots, prepare Gusto payroll for your review and get freelancer contracts ready in Docusign. Useful, but payroll and contracts are where a small mistake becomes an expensive one. Approve them line by line.

Three things we wouldn't hand Duet yet

Client-owned accounts on a personal plan. Duet is on Pro and Max for now, so it works for one person. Connecting a client's inbox, ad account or Shopify store to one person's agent puts that client's data in a personal account with no admin view, and controls like audit logs sit on Enterprise plans. Wait for Team and Enterprise.
Anything published under a client's brand without a person reading it. Social posts, store changes, public pages. Even Anthropic lists the Shopify visual storefront editor as coming soon.
Time-critical monitoring. Duet checks in every few hours, and Anthropic says it can miss something that arrives in between. Don't make it the alarm for a client's site going down.

Where sharable.link fits

A lot of what you'll prepare with Duet ends up in front of a client: the weekly report, a dashboard, the pitch prototype. Duet brings over the apps connected to your Claude account, so the sharable.link connector should come with it. You put the report together in Duet, Claude publishes it and replies with a link, and you choose who can open it: anyone with the link, anyone with a password, or only people at the client's company domain, who sign in with Google or Microsoft. Update the page later and the link stays the same.

We haven't tried this inside Duet yet, because the preview is US-only and invite-only. We'll update this post when we have. The same flow works today in Claude and Cowork. See how agencies use Claude to deliver client work and what Claude connectors are, or read about the sharable.link connector.

Get your agency ready before the invite

Duet can only notice what it can see. The agencies that get the most from it on day one will be the ones whose tools are already connected and whose way of working is already written down. You can do most of that today in your Claude account, so tick off what you've got.

Our take

Proactive agents will split agencies into two groups. One will hand Duet the production work and end up reviewing more drafts than before. The other will hand it the account work, the watching, chasing, briefing and following up, and get back hours that never showed up on a timesheet anyway. We'd bet on the second group.

Duet is a research preview, it's US-only for now, and Anthropic is upfront that it can misjudge what's urgent. Start with drafts that only reach you, then widen what it handles as it earns your trust. That's how you'd bring on a new account manager, too.

Sources: Anthropic's Claude Duet announcement and product page, with reporting from 9to5Mac, MacRumors and VentureBeat.