Anthropic has expanded Claude Cowork beyond its desktop-only origins, launching web and mobile versions that let AI-driven task sessions persist across devices and continue running in the background without an active connection.
The rollout marks a significant architectural shift for one of the most widely adopted agentic AI workspaces in enterprise environments.
The beta will begin with Max-tier subscribers in the coming weeks, with additional plan tiers expected to follow.
Claude Cowork Expands to Web and Mobile
Cowork serves as an agentic workspace where users delegate multi-step tasks to Claude, which then operates across connected files, calendars, email, messaging apps, and web resources until the task is complete.
According to Anthropic’s usage analysis, more than 90% of Cowork activity involves non-coding tasks, a notable contrast to the coding-heavy reputation most AI agents have built.
The largest use categories are business operations and content creation: reconciling quarterly spend into variance memos, converting contract folders into renewals trackers with flagged risks, and building client presentations from call transcripts and pipeline data.
This release introduces three structural shifts:
- Cross-device continuity: Sessions and files sync across desktop, web, and mobile, letting users start a task on one device and monitor or resume it on another.
- Offline background execution: Scheduled tasks can now run without any device being online. A task queued for 6 a.m., for instance, can process email threads and recent news, compile a briefing document, and draft a follow-up email for review, entirely unattended.
- Human-in-the-loop checkpoints: When Claude encounters a decision requiring human judgment, it pauses and sends the query to the user’s phone. Nothing is finalized or sent until explicit approval is given.
Anthropic emphasizes that desktop remains the most capable environment, since only the desktop client can directly access local files and the browser. The web and mobile versions primarily extend reach to users who previously couldn’t install a desktop application.
On web and desktop, chat and Cowork sessions now share a unified interface, with projects and artifacts synchronized across both surfaces, reducing context-switching for users managing multiple concurrent agent tasks.
For security teams and content operations that rely on AI agents, the shift to persistent, background-executing, cross-device sessions raises practical considerations regarding credential exposure, task audit trails, and approval-gate integrity. This is particularly relevant since Cowork integrates with email and messaging apps that may carry sensitive organizational data.
The “human approves before anything ships” model addresses some autonomous-action risk by design, but it doesn’t eliminate exposure. Organizations adopting Cowork at scale should evaluate:
- Logging granularity for background task execution across idle devices
- Permission scoping for connected email, calendar, and messaging integrations
- Approval-gate integrity, ensuring checkpoint prompts can’t be spoofed or bypassed
- Session persistence risk, since synced credentials across desktop, web, and mobile expand the attack surface if any single device is compromised
Web access launches directly from the claude.ai home screen. Mobile access is available via the Cowork option in the sidebar of the Claude iOS and Android apps. The full-featured experience, including local file and browser access, remains exclusive to the Claude desktop app.
Anthropic has also extended its doubled Cowork usage limits promotion through August 5, 2026, encouraging users to test larger, more complex delegated tasks during the transition period.
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