Claude Duet for marketers: what it does and how to use it

Anthropic opened a research preview of Claude Duet on October 21, 2026. It is a separate app where Claude works as a proactive agent: it messages you first, keeps working after you close it, and asks before it acts for you. This page covers what Duet does for marketing work, what it can't do yet, and how to schedule social posts with Claude while Duet matures.

Claude Duet is Anthropic's always-on agent app, available by waitlist to US Pro, Max and Ultra subscribers. It runs on Claude Opus 5.5 on its own cloud computer, sends a morning brief from your connected apps, drafts work for your approval and checks with you before it sends, pays, signs or deletes anything.

What is Claude Duet?

Claude Duet is "a new app where Claude works as a proactive agent," according to Anthropic's launch post (October 21, 2026). Anthropic built it "for professionals and small business owners with more on their plates than they can track."

How it works, per the Claude help center (read November 12, 2026):

• Its own computer. Duet runs on a virtual machine with its own browser, so work continues when your phone and laptop are off.
• One thread. You message it by typing or voice in one ongoing thread, and can open separate channels per topic that share the same memory.
• A morning brief. Each morning it looks across your email and calendar, picks what needs your attention, and can start first steps such as drafting replies.
• Periodic checks. It checks your connected accounts "every few hours", because checking nonstop would use up your plan's limits faster.
• Tasks and Make tabs. Tasks shows work in progress; finished files such as briefs, decks and dashboards land in Make.

It is a standalone app on iOS and Android, and also on claude.ai. Anthropic says it lives "in its own app, separate from the main Claude app" for now.

Who can get Claude Duet, and what does it cost?

Duet is a US-only waitlist preview for three individual plans. Team and Enterprise are not included yet.

Background work counts against your limits. The help center says the morning brief and check-ins "also count, so you may reach your limits sooner than with chat alone."

What marketing jobs can Claude Duet handle?

Duet is strongest at preparing work across apps and bringing you decisions. Anthropic's launch post lists jobs it can do through "over 6,000 connectors and plugins in the Claude Marketplace". These are the ones closest to marketing:

1. Campaign assets in Canva. "Turn your product launch into a social campaign in Canva."
2. CRM follow-ups. "Draft follow-up emails using the contact and deal history in HubSpot."
3. Inbox triage. "Find the Gmail and Slack messages you've missed and help you reply."
4. Meeting prep. The help center's example: "Pull together a brief on this company before my 2 pm meeting." A tester, brand strategist Mya Dalton, describes Duet preparing a client brief from her calendar on its own.
5. Decks and dashboards. Bigger jobs come back as files: a research brief, a slide deck or a dashboard.
6. A LinkedIn job post. "Draft a job posting and, once you edit and approve, post it to LinkedIn."
7. Shopify. "Set up, design, and manage your Shopify store."

In practice, a marketer could ask Duet to watch the inbox for partner requests, keep a weekly launch brief current, and prepare a recap deck after each campaign. It will check with you before it sends any email.

What can't Claude Duet do yet?

The help center lists its limits plainly. For marketing teams, these matter most:

• No model choice. It runs on Claude Opus 5.5.
• No watching the browser. You can't watch Duet work in its browser or take over.
• Gaps between checks. "Something urgent can arrive between checks." Don't rely on it for real-time community management.
• Read-only on your Claude work. It "can read your work in Claude but can't change it", and can't see all your projects or files on your computer.
• Some connectors are limited. Slack works "with limits"; Microsoft 365 isn't available yet.
• No calls or texts to other people. It can send email from connected accounts with your approval.
• It can be wrong. Anthropic says it "can make mistakes, such as misreading a thread or misjudging what's urgent."

There is no documented social media scheduling or publishing feature. The LinkedIn job-post example is the only social posting mention we found in Anthropic's materials.

Which connectors does Claude Duet use?

Duet uses the connectors on your Claude account. The help center says "Claude Duet runs on your Claude account, so the memory, skills, and connectors you've set up in Claude are there from your first message," and names Gmail, Google Calendar, Google Drive, Slack, QuickBooks, HubSpot, Docusign and Calendly. Link and Shop Pay are Duet-only and connected inside Duet.

What's unclear is custom connectors, the remote MCP servers you add yourself by URL in Claude. Be precise about what is known:

If you depend on a custom connector, test it in Duet with a one-off request before you build a routine around it.

How do you schedule social posts with Claude today?

Use the main Claude app with a custom connector. Custom connectors using remote MCP work on Claude, Cowork and Claude Desktop on Free, Pro, Max, Ultra, Team and Enterprise plans, and Free is limited to one (Claude help center, November 2026).

With Tracee as the example:

1. In Claude, open Customize > Connectors, choose + Add, then Add custom connector.
2. Enter https://traceeai.com/mcp and connect.
3. Sign in to Tracee and pick your workspace.
4. Ask Claude: "Draft this week's launch posts for LinkedIn, X and Instagram in Tracee and schedule them for Tuesday at 9:00."

Agent posts wait in Tracee's Approvals queue by default, so a person approves each one before it publishes. On Team and Enterprise plans an Owner adds the connector first, then each member connects. The full walkthrough, including Claude Desktop, mobile and Claude Code, is in our guide to scheduling social media posts with Claude.

Because Duet carries over your Claude connectors, adding Tracee in Claude is also the way to find out whether your Duet account can call it. If it can't, keep the split below.

How should a marketer split work between Duet and Claude?

Give Duet the watching and preparing, and keep publishing where it is documented.

This also keeps approvals in two places, which is what you want while Duet is a preview. Our approval workflow for AI agents covers how to set rules for who approves what.

How safe is Claude Duet with brand and customer data?

Anthropic describes several safeguards. Duet "never directly sees your passwords or sign-in tokens", actions go through Anthropic's auto mode classifier, and a dedicated classifier blocks sharing the strictest tier of information, such as card numbers and government IDs. Before it sends a message, makes a payment, signs a document or deletes anything, it shows exactly what it will do and waits. Trading securities and moving money between accounts are blocked even with approval.

The help center also warns about prompt injection: email and web pages "can contain instructions meant to mislead it", and "no defense is perfect". Review drafts before you approve them, especially replies to people outside your company.

How does Duet compare with the other new agents?

Duet arrived in a busy fall, between OpenAI Dots (September 29), Meta Muse (September 8) and Grok Bot 1.0 (early November). It is the only one of the four not yet sold to teams. Our comparison of Dots, Muse, Duet and Grok Bot lays out plans, connectors and privacy notes side by side.

Next step

Join the Duet waitlist if you are on a US Pro, Max or Ultra plan, and start it on briefs and follow-ups. For social posts, connect Tracee to Claude as a custom connector now; it works on every Claude plan, and you'll know quickly whether Duet picks it up too.