September 29, 2025 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 n
Open original sourceSeptember 29, 2025
September 29, 2025 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 n
Evidence chain
External discussion
No reviewed external discussion has been linked yet. This does not change the evidence confidence.