Articles

Redesigning source control at Anthropic

As merges to Anthropic's monorepo grew from about 2,500 to more than 30,000 a day, source control became the biggest development bottleneck. Here is how the team built Scion, an in-house version control system designed for always-online agents, and migrated off git in five months.

How the Claude Code team does code review

How do you review code at the volume agents produce it? The Claude Code team shares its review process, from Claude verifying its own work to risk-tiered human approval, plus a checklist for adopting it.

Code Review is now generally available

Catch more bugs before they reach production.

Build live dashboards and animate explainers with Claude 

Claude Dashboards and Claude Motion are now in beta. Docs, Slides, and Design are out of beta and on every Claude plan, including Free.

Claude Code in the cloud: a field guide to cloud sessions

What changes when Claude Code runs on its own machine, the workflows where that pays off, and how to connect GitHub on the first try.

Getting started with Claude Code mods

Customize Claude Code with mods

Change how Claude Code behaves and looks with a few lines of TypeScript.

Claude for Government is now generally available

Claude Code CLI and Claude for Microsoft 365 also now available in early access.

Claude Sonnet 5.5

Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family. It’s a clear upgrade over Claude Sonnet 5, runs 30%+ faster, and costs up to 30% less for most work.

Using Claude Code: Spending your effort

What effort really is and when to use which level in Claude Code, from my own tests of three builds and a deep dive into Terminal-Bench 3.0 on Opus 5.5 and Fable 5.1.

What a task costs on Opus 5.5

The same token price can cost very different amounts per task. Learn what Claude Code tasks cost on Opus 5.5 and which settings change the bill.

Coding sessions are longer and use more context. Claude Opus 5.5 is built with that in mind.

Our latest Opus model is priced and trained to optimize costs for how developers code now.