Executor Model, Reviewer Model: Why Cross-Vendor Code Review Actually Works
I thought one of my projects was in reasonable shape. I had been working in it for months, it was on version 4.24.3, and Claude had been through most of it more than once. Then I pointed Codex GPT-5.6 Sol at it with Ultra High reasoning, asked it to evaluate the codebase and file issues for anything it found, and it came back with 42 new issues in about ten minutes. Some of them were release blocking. I had Claude Opus 4.8 go through all 42 looking for false positives, and it confirmed zero. Every issue was real. That result is what convinced me to stop having one vendor's model check its own family's work. The Setup: One Model Writes, a Different Vendor Reviews The workflow is simple to state. Implement with one model, working from the most critical issues to the least critical and matching model strength to issue criticality: the highest-confidence model takes the most critical work, and the cheaper, faster models take the routine fixes further down the list. Then valid...