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Written by AI from the official notes. Check them for exact details.Claude Sonnet 4.5 has launched, enhancing capabilities for Pro users and improving Claude in Chrome.
- Launch of Claude Sonnet 4.5, optimized for real-world tasks and coding.
- Pro users can create and edit files on mobile devices.
- Claude in Chrome now defaults to Sonnet 4.5 for better performance.
- Claude can manage multiple browser tabs simultaneously.
- Improved navigation for popular sites like Slack and Google Docs.
Why it matters: Users of Claude, especially Pro plan subscribers, should explore new features for enhanced productivity.
Full release notes5 changes
Claude Sonnet 4.5 launch
We released our newest model, Sonnet 4.5. This is the best model in the world for real-world agents, coding, and computer use. Read our blog post here: Claude Sonnet 4.5.
Creating and editing files with Claude for Pro plans and mobile
Pro users can now leverage Claude’s file creation and editing capabilities, and users on all paid plans can access these features on Claude for iOS or Android. See this updated article for more information: Create and edit files with Claude.
Claude in Chrome updates
The remaining Max users on our waitlist were granted access to Claude in Chrome, along with the following updates:
- Powered by Sonnet 4.5: Claude in Chrome now defaults to Sonnet 4.5, our smartest model yet. Improved for browser tasks, you'll notice better reasoning, fewer errors, and more reliable task completion—especially for multi-step workflows.
- Work across multiple tabs: Claude can now juggle multiple browser tabs at once. Just drag tabs into Claude's tab group and it can see and work across all of them simultaneously—no more jumping back and forth to gather information before taking action.
- Smarter on the sites you use every day: Claude now understands how to navigate Slack, Google Calendar, Gmail, Google Docs, and GitHub without you having to direct every click. Ask Claude to "schedule a meeting" or "update the doc" and it knows what to do—no need to walk it through every step. We’re continuing to improve Claude’s understanding of other popular sites.
- Get notified when Claude needs you: Turn on notifications and Claude will ping you when it needs your permission or when a task is complete. Now you can switch to other work while Claude handles things in the background.
- Show Claude exactly what you mean: Upload images or take screenshots of specific screen areas to give Claude precise visual context. Much faster than describing what you're looking at.