Claude Duet research preview (Oct 21, 2026): proactive agent app for US Pro and Max subscribers via waitlist. Runs on Claude Opus 5.5. Cloud VM with browser enables background work without local device online.
Requires approval before sending messages, payments, signing documents, or deletions. Morning briefs from connected email/calendar; periodic account checks (not continuous polling) to conserve usage limits. Shares Pro/Max session and weekly usage caps with main Claude.
Not available on Team/Enterprise yet. Standalone iOS/Android app and claude.ai surface separate from main Claude app during preview.