As of: 2026-10-22 13:31 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/p/2026-10-21-claudeai-claude-duet-launch/

# Claude: research preview of Claude Duet, a proactive agent app

Claude (@claudeai), X, 2026-10-21.
Source: https://x.com/claudeai/status/2112984664256241837

## Why it matters

Official launch post for Anthropic's background agent app; 6.9M views.

## Summary

Launch announcement of Claude Duet.

## Archived text

> We're opening a research preview of Claude Duet, a new app where Claude works as a proactive agent.
>
> It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf.


## Cited in

- 2026-10-21: [Anthropic launches Claude Duet, a proactive background agent app on iOS, Android and the web (research preview)](https://postcutoff.com/e/2026-10-21-anthropic-claude-duet/)