Anthropic opened a US research-preview waitlist for Claude Duet on October 21, built on Claude Opus 5.5 and pitched directly at “professionals and small business owners.” It’s the third always-on agent to ship in six weeks, after OpenAI framed as always-on Dots and Meta’s Muse, and the first to point its proactivity at the specific pain points of a one-to-four-person business: unpaid invoices, cold follow-ups, and the sales-call prep nobody has time to do.

The behavior is the pitch. Duet sends a morning brief on the most important items across connected apps, then checks those apps every few hours and only messages when something needs attention. It runs on a cloud virtual machine with its own browser, which means it keeps working when the laptop is closed. The integration list reads like an owner-operator’s actual stack: QuickBooks and Stripe for invoice chase, HubSpot for sales follow-up, Docusign for agreements. Anthropic says Claude Marketplace now hosts over 6,000 connectors and plugins behind it.

Guardrails are tighter than the marketing copy suggests. Per The Verge, Duet asks for approval before sending a message, making a payment, signing a document, or deleting anything, and a new classifier is designed to reject requests to share the strictest tier of information such as credit card numbers. TechCrunch notes it can’t trade securities or move money between accounts even with approval. Anthropic concedes Duet “still might misread a thread or miscalibrate what’s urgent.”

A few catches worth noting. Background checks count against existing Pro and Max usage limits. Access rolls out in waves to US subscribers only. Team and Enterprise plans aren’t yet eligible, which is a tell: Anthropic is testing with individuals before it tests inside orgs.

Zoom out and the category has converged quickly. In the same month, monday.com just shipped as a voice AI that follows up on every lead and OpenAI pushed Dots as the thesis that an always-on agent beats a sharper prompt. Three vendors, one bet: the prompt box is over, and the next interface is the morning brief you didn’t ask for.

Sources