Anthropic unveils Claude Duet, a proactive AI agent for Pro and Max subscribers

The new assistant, powered by Claude Opus 5.5, opens by waitlist to US Pro and Max subscribers as a research preview On October 21, 2026, the company introduced Claude Duet , a proactive AI agent built to work like a personal assistant or “chief of staff.” It is opening through a waitlist, and only for Claude Pro and Max subscribers in the US. The pitch is simple. Duet watches the apps where your work piles up, picks up tasks on its own, and checks with you before doing anything consequential. Duet runs on Claude Opus 5.5, the model Anthropic chose to power the new agent. It also pulls in the memory and skills already attached to a user’s existing Claude account.

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