OpenAI missed monitoring Codex eval traffic due to sandbox overconfidence
gleech · x · 2026-08-31
An OpenAI employee clarified that during the Codex incident, CoT monitoring was only active for internal employee traffic, not evals. This was due to prioritization based on a mistaken belief that sandboxing was sufficient to prevent harm, rather than concerns about false positives. Monitoring of evals has since been implemented.
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