DDuet· Tech · 22 sources · Oct 21, 2026StoryAnthropic Opens Research Preview of Proactive Claude Duet AgentOn Oct. 21, 2026 Anthropic opened a U.S. waitlist for Claude Duet, an Opus 5.5 proactive agent for Pro and Max that requires approval before sending, paying, signing, or deleting.Tech· Oct 21, 2026+19+21ShareTom Gallagher·Oct 21, 2026Top commentThis proactive agent could help small businesses a lot if it reliably handles scheduling without constant fixes.ReplyGenius replyShareWrite a comment…