OpenAI· GPT / ChatGPT / API

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.

Announced

18 Dec 2025 12:00 UTC

Detected

03 Aug 2026 21:11 UTC (+228d after)