Introducing Code Review, a new feature for Claude Code.

Today we’re introducing Code Review, a new feature for Claude Code. It’s available now in research preview for Team and Enterprise. Code output per Anthropic engineer has grown 200% in the last year. Reviews quickly became a bottleneck. We needed a reviewer we could trust on every PR. Code Review is the result: deep, multi-agent reviews that catch bugs human reviewers often miss themselves.  We've been running this internally for months: * Substantive review comments on PRs went from 16% to 54% * Less than 1% of findings are marked incorrect by engineers * On large PRs (1,000+ lines), 84% surface findings, averaging 7.5 issues Code Review is built for depth, not speed. Reviews average \~20 minutes and generally $15–25. It's more expensive than lightweight scans, like the Claude Code GitHub Action, to find the bugs that potentially lead to costly production incidents. It won't approve PRs. That's still a human call. But, it helps close the gap so human reviewers can keep up with what’s shipping. More here: claude.com/blog/code-review