Physix Frontier · News Briefing Card (enbrief · Oct 22, 2026)

Anthropic Launches Proactive Agent Claude Duet in Research Preview

KEY FACTS

Anthropic released Claude Duet on October 21, positioning it as an AI agent that can work proactively.
The app is built on Claude Opus 5.5 and is available on iOS, Android, and the web.
A waitlist is initially open to Pro and Max subscribers in the United States.
Claude Duet has its own dedicated virtual machine and browser, and can keep running after the user's device is turned off.
It can call on more than 6,000 connectors and plugins in the Claude Marketplace.
User approval is required before it sends messages, makes payments, signs documents, or deletes content.

KEY DATA

More than 6,000Number of connectors and plugins

Claude Opus 5.5Underlying model

PHYSIX OBSERVATION

Proactive agents are becoming the new battleground for the big players, and Anthropic is entering with a dedicated virtual machine plus an approval mechanism, trying to strike a balance between capability and safety. But the preview version admits it will misjudge and is weak on personal affairs, showing it is still far from truly "working for you." For users, trying it out is fine, but entrusting it with critical operations still requires caution.

Source: enbrief original report ↗