AI summary
Written by AI from the official notes. Check them for exact details.Claude Opus 4.5 has launched, along with new features for Claude in Excel and Chrome.
- Claude Opus 4.5 is the most powerful model released.
- Claude for Excel beta now supports pivot tables and charts.
- Infinite-length conversations with reduced length limit errors.
- Claude in Chrome now allows scheduled tasks and model selection.
Why it matters: Users of Claude tools should explore these updates for enhanced functionality and improved performance.
Full release notes3 changes
Claude Opus 4.5 launch
We released our most powerful frontier model to date. Read our blog post for more information: Introducing Claude Opus 4.5.
Claude for Excel beta release
Claude for Excel is now available in beta to all Max, Team, and Enterprise users. We’ve added some additional capabilities, such as support for pivot tables, charts and file uploads, plus a shortcut to quickly open the full Claude app from Excel (ctrl+option+c). We've also made overall improvements to performance, speed, context management, and the general user experience. See Use Claude for Excel.
Context window compaction
We’ve changed our context window functionality to enable infinite-length conversations (with some exceptions) and significantly reduce length limit errors by summarizing earlier messages when a chat approaches its context limit. Read more here: Understanding Usage and Length Limits.
Claude in Chrome updates
Claude in Chrome is now available in beta to all Max plan subscribers. After months of testing, we're expanding access with the following updates:
- Scheduled tasks: Set recurring browser tasks to run automatically on your schedule. Set it once and Claude handles it from there.
- Follow a plan: Approve Claude's plan, then let it execute the entire workflow independently within those approved boundaries, without asking for permission until it's done.
- Model selection: Choose between Haiku 4.5 for speed, Sonnet 4.5 for complex tasks, or Opus 4.5 for maximum reasoning power—switch anytime based on what you need.