Claude Duet users get 3 invites each, US only

Anthropic is now giving each Claude Duet user three invites to pass on, and eligible invitees also get a free week of Claude Pro, Testing Catalog reported on Threads on November 12. Duet itself is still US only. If you join through one of those invites, Duet runs on Pro’s usage limits at the same rate as chat in Claude, and its background work counts too, so Anthropic’s help page warns that you may reach your limits sooner than with chat alone.

What counts against your limits?

During the research preview, Duet comes with Pro, Max and Ultra at no extra cost. It uses the same five-hour session limit and weekly limits as chat. The background work is the morning brief, a short rundown of the most important items across your connected apps, plus the check-ins during the day, and Duet looks at connected apps every few hours.

To give you room to try it, Anthropic is adding full limit resets to accounts during the preview. Each one refills both the five-hour session and the weekly limits when you choose to use it in Settings > Usage on the web or in Claude Desktop, and the number you get depends on your plan. Unused Duet resets expire on December 15, 2026. The single full reset Anthropic gave all Pro, Max, Ultra and Team users in November has an earlier deadline of December 10, so if you hold both, that one runs out first.

Where it stops and asks

Duet reads, drafts and prepares work on its own, but it is designed to show you what it is about to do and wait for approval before it sends a message, makes a payment, signs a document or deletes anything. If you can’t approve right away, it finishes the rest of the task and brings the approval back to you later. Trading securities and moving money between accounts are off-limits even with approval. When it gives you a number or a summary, it names the email, file or spreadsheet it came from.

Purchases go through two partner services, Link and Shop Pay. For now they work only in Duet, and you connect them inside Duet instead of the connectors directory. Duet is designed to ask before each purchase, and each one uses a one-time card that works only for that purchase.

Email and web pages written by other people can carry instructions meant to mislead the agent, a technique called prompt injection. Duet is built to treat what it reads as information and act on what you ask, but Anthropic writes that “no defense is perfect,” which is one reason consequential actions need your approval. It can also misread a thread or misjudge what’s urgent, so drafts and approval requests are worth reviewing before you confirm them. Duet is aimed at professionals and small business owners, and personal errands like booking tickets are not “quite as strong,” Anthropic said, per CNBC.

Your account, connectors and chats

Duet runs on your Claude account, so the memory, skills and connectors you’ve already set up are there from your first message. It works on its own computer in the cloud and keeps working after you close the app. Supported connectors include Gmail, Google Calendar, Google Drive, Slack, QuickBooks, HubSpot, Docusign and Calendly. You start every connection yourself and can disconnect any app at any time; that stops Duet from accessing the app from then on, yet Duet still keeps memory of past information from earlier conversations.

Past chats are searchable too: Duet looks through its own chats and your Claude chats outside projects, and a deleted chat drops out of search. It uses the same Search and reference chats setting as Claude, so to keep Duet out of your history, turn that setting off in Settings > Your Claude, or Settings > Memory in the older Settings layout.