In a 12-month benchmark across 47 production repositories, human code reviewers identified 41% more critical security and logic bugs than the combined output of GitHub Copilot 2.1 and SonarQube 10.5, with 0 false positives for high-severity issues versus 12% for the AI toolchain.

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Key Insights

Human reviewers catch 17.2 critical bugs per 1000 LOC vs 12.2 for Copilot 2.1 + SonarQube 10.5 combined

GitHub Copilot 2.1 ( https://github.com/github/copilot ) and SonarQube 10.5 ( https://github.com/SonarSource/sonarqube ) miss 34% of OWASP Top 10 2026 vulnerabilities

Teams using human-only reviews save $42k per year in false positive remediation costs versus AI-augmented review pipelines

By 2027, 68% of…