# OpenRouter shows how to build an AI code reviewer that runs checks in a sandbox

> Original title: Build an AI Code Reviewer with OpenRouter

- Source: OpenRouter Blog
- Published: 2026-11-01T00:00:00.000Z
- Bad Influence: https://badinfluence.news/items/x6395ulxj7khrpbh5azjhl7tc
- Original: https://openrouter.ai/blog/tutorials/ai-code-review/

## Summary

OpenRouter publishes a tutorial for building an AI code reviewer that uses its Responses API, a hosted Linux sandbox, and patch tools. The reviewer runs short checks to confirm each bug and returns fixes as patches. In the authors' tests on a five-bug change, a review took one to four minutes and cost $0.015 to $0.045.