Claude Duet

Anthropic's proactive background agent for email, Slack, and daily tasks

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// about Claude Duet

Claude Duet is a separate Anthropic app where Claude works in the background instead of waiting for prompts. It runs on Claude Opus 5.5 in its own virtual environment with a browser, surfaces things that need your attention, takes on tasks you hand it, and keeps going while you're away. It asks for approval before sending messages, making payments, signing documents, or deleting files. Duet launched as a waitlisted research preview on October 21, 2026, for US Pro, Max, and Ultra subscribers on iOS, Android, and claude.ai. Its usage counts against your normal Claude plan limits.