Claude Duet research preview: an overnight agent on Opus 5.5
Claude Duet runs overnight in its own VM with a browser, messages you first in the morning, and requires approval for sends, payments and signatures while hard-blocking trading and transfers.
HOLY SH*T THIS IS QUIETLY INSANE: Anthropic shipped a Claude that works the night shift inside its own browser and messages you first in the morning like a real employee Claude Duet. Research preview. Built on Opus 5.5. 8.3M views on the announcement and the waitlist is already melting The shift nobody caught: Claude no longer waits for your prompt. It runs in its own virtual machine with a browser, works while your phone and laptop are off, and only pings YOU when a human is actually required One night on a creator's phone. The phone stayed locked almost all of it: -> 23:00 you lock the screen and go to sleep. the VM boots up -> 02:00 Duet reads a brand email, finds a sponsor invoice 9 days late, catches a calendar collision -> 08:00 Claude messages first: "brief, 3 things need you. a brand wants a quote" -> "reply drafted with your usual rates. send it?" tap. sent -> "sponsor invoice is 9 days late. reminder ready?" approve. sent -> voice note from you: "build the launch campaign". Duet opens its own browser: "building the campaign in my VM" -> "brand contract is ready. signing = your yes" tap. signed -> "campaign done. 5 assets ready" -> red line fires: "buy 10 shares → blocked. even with your yes" 6,000+ connectors already wired in. Gmail, Slack, Calendar, Stripe, QuickBooks, Docusign, HubSpot, Canva, Drive, Shopify. One continuous conversation. Text or voice. Phone can sleep. The VM keeps going The counter at the bottom of the screen says the whole product in one line: sent without you: 0 Nothing moves without your yes. Before any send, payment, signature or deletion, Duet shows you the exact action and waits. Hard limits burned in by Anthropic: -> no trading, even with your yes -> no transfers between your own accounts, even with your yes -> never sees passwords or tokens -> purchases run through Stripe Link on a virtual card -> card numbers and document ids never leave your account Real cases Anthropic put in the announcement: -> Mya Dalton, brand strategist: Duet prepped the brief and suggested rescheduling a call because the slot was right before her flight -> Jess Provencher, realtor: Duet caught on its own that a property showing was scheduled on the wrong day -> Boris Cherny, who runs Claude Code: walks around dictating his todo list to Duet instead of sitting at a desk The real shift: every other AI tool is a tab you open. Duet opens the tab, drafts the reply, chases the invoice, signs the contract, builds the campaign, and asks you for one thing: yes or no Put your phone face down. The VM is already running Bookmark this before the preview cap hits
This post quotes another post: “Build your own Claude Duet with Claude Code and Opus 5.5”