It is not another chat box
On October 21, Anthropic opened a research preview of Claude Duet. It does not follow the ChatGPT pattern of you ask, it answers. Duet is a proactive agent: every morning it drops a brief of what needs your attention, then watches the apps you have connected through the day and only pings you when something actually needs you. It runs on Opus 5.5 and is currently a waitlist for US Pro and Max subscribers.
It really works in the background
Duet runs on a cloud virtual machine with its own browser, so it keeps working after you shut your laptop or lock your phone. Scheduling meetings, triaging email, chasing invoices, building sales forecasts, assembling dashboards, even spinning up a web app are all on its example list. When a task is done, or when it needs your sign-off, it sends a notification. Setup is light because it inherits the memory, skills, and app connections already in your Claude account.
Sixty thousand connectors are the backbone
Duet can call more than six thousand connectors and plugins in the Claude Marketplace, reaching Gmail, Slack, Canva, Shopify and a long list of office and commerce services. For payments it uses a link or Shop Pay with your approval, backed by a virtual card so your real card number stays hidden. For a small business that matters: it can chain order, follow-up, and reconciliation together without you hopping between tabs. It can also pull data from dozens of tools into one dashboard, removing the manual copy-paste.
Money and permissions stop at your yes
Sending messages, spending money, signing documents, and deleting content all require Duet to lay out the step and wait. Trading securities and moving money between accounts are blocked outright, approval or not. On safety it never sees your passwords or sign-in tokens, and a new classifier screens outgoing text for leaked IDs and credit card numbers. Anthropic says the important decisions stay with you, and here that is the default behavior, not a slogan.
Do not expect it to book your tickets
It is built for work, so personal errands are weaker. Booking flights or show tickets is, in Anthropic's own words, not its strong suit yet. It is also an early preview that may misread a thread or misjudge what is urgent, and it will not show you the full browser session. Treat it as a work copilot, not a full-time butler. Start with low-risk jobs like inbox cleanup or a weekly sales brief before handing over anything consequential.
Who it fits, who it does not
If you are a small-business owner or solo operator chased by email, calendar, and to-dos, this proactive shape fits better than a question-answer bot. But Team and Enterprise are excluded for now, and invites go out in waves. The preview costs nothing extra, and each admitted user gets one full usage reset through November 30. Rivals Meta Muse (September 8) and OpenAI dots (September 29) shipped earlier; Duet is betting on a work-first angle. Whether it is worth it depends on whether it removes worry rather than adds a new thing to worry about.
How it differs from Muse and dots
The three take different paths. Meta's Muse leans consumer, hitting the App Store top spot on September 8 as a personal-life assistant. OpenAI's dots entered ChatGPT on September 29, serving both consumer and enterprise. Duet explicitly targets work and is weaker at personal errands. For people already deep in Claude, Duet's value is no ecosystem switch: your memory, skills, and connections stay, it just adds a proactive background runner. But on raw cleverness all three are early, none yet at the truly-decides-for-you stage.
One workflow that actually lands
Do not picture a sci-fi butler; picture a junior assistant that never sleeps. A concrete rhythm: each morning it sends a brief flagging emails to answer and invoices to chase; you reply, list last month's overdue vendors and nudge each, and it runs, showing you the draft before anything goes out. What you save is the time of opening every backend and moving numbers by hand, not a fully hands-off life. It reports when done and asks when stuck, and that boundary is still fairly clear.
Do not ignore usage and cost
The preview is free of extra charges, but it draws from your Claude plan's same allowance, and background checks count too. Anthropic says it scans connected services every few hours rather than continuously, because constant scanning would burn the allowance fast. So do not expect second-level response like live monitoring; something urgent may arrive between checks. Each admitted user also gets one full usage reset through November 30, effectively a free window to experiment.
The biggest hurdle right now is access
Do not just watch the capability, watch the gate. Duet is open only to US Pro and Max subscribers on a waitlist; Team and Enterprise are out, and other countries are not yet in. So if you are outside the US or on a company Team account, you cannot even apply yet. Anthropic says invites go out in waves but gave no timeline. Stay interested, but before waiting, confirm your account and region are in this wave rather than watching for nothing.
What this means for youDuet's value is not model strength but the rhythm of watching for you and only interrupting at the key moment. But do not open every permission at once; pilot with low-risk tasks for two weeks first.