Claude Duet

Claude Duet is a research-preview app from Anthropic in which Claude acts as a proactive agent. It sends a short morning brief on the most important items across connected apps, checks those accounts every few hours, and messages the user only when something needs attention. Users can also hand it tasks by text or voice in a single ongoing thread, from scheduling meetings to building dashboards, financial or sales forecasts, prototypes and web apps.

It is designed around Claude Opus 5.5 and carries over memory, skills and connected apps from the user's Claude account. It runs on a virtual machine with its own browser, so work continues when the user's laptop or phone is off, and the user is notified when a task finishes or needs review. Anthropic says it checks with the user before acting on their behalf.

Safety measures described by Anthropic include credential handling in which the agent never directly sees passwords or sign-in tokens, an auto mode classifier approving actions, prompt-injection defenses, and a dedicated classifier and system prompt that blocks sharing the strictest tier of sensitive data (such as credit card numbers and government IDs). Health or finance data is shared only on explicit instruction.

It is available as a standalone iOS and Android app and on claude.ai, included in Pro, Max and Ultra plans with the same usage limits as the rest of Claude. Access is by waitlist, starting with US users only.