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Public story · 2026-08-04 · high
A LeadDev article credited Claude's review with lifting Codex to 89.7 percent, but solo Claude scored 91.4 percent.
Why now: Both the original claim and its correction were sitting on the same r/ClaudeAI thread as of Aug. 4.
A top reply on r/ClaudeAI showed solo Claude Opus 4.7 scored higher than Codex's Claude-reviewed code, 91.4% versus 89.7%.
For teams building multi-agent code review, direction decides everything. Reverse the pairing, with Codex reviewing Claude, and Claude's score falls to 82.8%.
The 89.7% figure came from a LeadDev article that hit 409 upvotes on r/ClaudeAI. It covered arXiv:2607.21656, which tested 116 medium and hard LiveCodeBench tasks and found Claude's review lifted Codex GPT-5.5's pass rate from 71.6% to 89.7%.
That number isn't wrong. The top comment, at 93 upvotes, added what the article left out. Claude Opus 4.7 alone hit 91.4%, and self-review changed nothing.
The pairing is hierarchy-driven: a stronger model reviewing a weaker one helps, but reversed, it just drags the stronger model down.
The best score in the whole paper came from Claude working alone, with no reviewer at all.
Builders wiring review loops should rank reviewer and drafter by benchmark score, not assume a second model is automatically safer.
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