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Claude

@claudeai

Feb 20 • 5 tweets • 2 min read • Read on X

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Claude Code on desktop can now preview your running apps, review your code, and handle CI failures and PRs in the background.

Here’s what's new:

Server previews: Claude can now start dev servers and preview your running app right in the desktop interface.

It reads console logs, catches errors, and keeps iterating.

Local code review: When you're ready to push, hit "Review code" and Claude leaves inline comments on bugs and issues before it goes to a full code review.

PR monitoring: Open a PR and Claude tracks CI in the background.

With auto-fix, it attempts to resolve failures automatically. With auto-merge, PRs land as soon as checks pass.

Work on your next task while Claude monitors the previous one.

Session mobility: Sessions move with you now.

Run /desktop to bring a CLI session into the desktop app, or push it to the cloud and pick it up from the web or your phone.

Update or download Claude Code on desktop to get started: claude.com/download

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More from @claudeai

Claude

@claudeai

Feb 20

Our latest Claude Code hackathon is officially a wrap.

500 builders spent a week exploring what they could do with Opus 4.6 and Claude Code.

Meet the winners:

🥇CrossBeam by Mike Brown

California builders lose months navigating permit corrections.

CrossBeam speeds up California's permitting process by giving builders and municipalities faster tools for code compliance and plan review.

🥈 Elisa by Jon McBee

A visual programming environment for kids where you snap blocks together and Claude spins up agents to build the real code behind the scenes.

The first user: his 12-year-old daughter.

Read 7 tweets

Claude

@claudeai

Feb 17

This is Claude Sonnet 4.6: our most capable Sonnet model yet.

It’s a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design.

It also features a 1M token context window in beta.

Sonnet 4.6 has improved on benchmarks across the board.

It approaches Opus-level intelligence at a price point that makes it practical for far more tasks.

Sonnet 4.6 also shows a major improvement in computer use skills.

Early users are seeing human-level capability on tasks like complex spreadsheets and multi-step web forms.

Read 6 tweets

Claude

@claudeai

Feb 7

Our teams have been building with a 2.5x-faster version of Claude Opus 4.6.

We’re now making it available as an early experiment via Claude Code and our API.

Fast mode is more expensive to run. It’s for urgent, high-stakes projects, combining impressive speed with Opus-level intelligence.

Read more: code.claude.com/docs/en/fast-m…

Fast mode is available now for Claude Code users with extra usage enabled (use /fast).

It’s also available in research preview on @cursor_ai, @emergentlabs, @FactoryAI, @figma, @github Copilot, @Lovable, @v0, and @windsurf.

Read 4 tweets

Claude

@claudeai

Feb 5

Introducing Claude Opus 4.6. Our smartest model got an upgrade.

Opus 4.6 plans more carefully, sustains agentic tasks for longer, operates reliably in massive codebases, and catches its own mistakes.

It’s also our first Opus-class model with 1M token context in beta.

Opus 4.6 is state-of-the-art on several evaluations including agentic coding, multi-discipline reasoning, knowledge work, and agentic search.

We're also shipping new features across Claude in Excel, Claude in PowerPoint, Claude Code, and our API to let Opus 4.6 do even more.

Claude in Excel now handles long-running and harder tasks with improved performance.

It can plan before acting, support richer functionalities like conditional formatting and data validation, and handle multi-step changes in one pass.

Read more: claude.com/blog/opus-4-6-…