Human Code Reviewers Outperform AI Tools by 41% in Security Bug Detection

A 12-month benchmark across 47 production repositories reveals that human code reviewers catch 41% more critical bugs than AI tools like GitHub Copilot and SonarQube, directly contradicting vendor promises of AI-driven review automation. While AI tools reduce review time by 60%, they miss 34% of security vulnerabilities and generate costly false positives, ultimately costing teams $42,000 more annually than human-only review processes. This finding is particularly critical for regulated industries like fintech and healthcare, where human reviewers maintain 100% compliance while AI tools achieve only 72%.