Martian's Independent Benchmark Tested 13 Code Review Tools

Last week, Martian released  Code Review Bench  --- the first independent, open-source benchmark for AI code review tools. It tracks over 200,000 real pull requests across GitHub, measures which review comments developers actually act on, and updates daily. The methodology and code are fully open source. Kilo's Code Reviewer ranked as the #1 open source code review tool across all values of beta. Whether you optimize for low noise (precision) or high thoroughness (recall), Kilo is the best open source option on the board. Why This Benchmark is Different If you've been around the AI benchmarking space, you know the pattern: a benchmark launches, tools optimize for it, it becomes less reliable. SWE-bench went through this cycle three times before OpenAI recommended everyone stop reporting scores entirely. Frontier models had memorized the gold patches. Over half the unsolved problems had broken tests. Martian's Code Review Bench was specifically built to avoid this. It works on two level