OpenAI Blog · Dec 18, 2025
Evaluating chain-of-thought monitorability
Reviewed by Errol Vogt, Site support technician & online learning analyst · original summary · editorial policy
Evaluating chain-of-thought monitorability. OpenAI introduces a new framework and evaluation suite for chain-of-thought monitorability, covering 13 evaluations across 24 environments. Our findings show that monitoring a model’s internal reasoning is far more effective than monitoring outputs alone, offering a promising path toward scalable control as AI systems grow more capable. This update is relevant for small-office operators tracking changes in their tools.
Operator takeaway: For operators: review whether 'Evaluating chain-of-thought monitorability' affects your current setup before relying on it in production.
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