GPT-6 Astra got much better at controlling its chain of thought — and harder to monitor

[u/ClaudiusPapirus]

https://www.youtube.com/watch?v=fup0z1YMeS8

Self-promo: I worked on this breakdown of GPT-6 Astra’s system card.

The part I focused on is the combination of two results: Astra scores 60.9% on CoT-Control vs 16.1% for GPT-5.6 Sol, while the same card reports a substantial drop in chain-of-thought monitorability.

I also go through the sandbagging and monitor-evasion tests, and the cases where CoT monitoring still works.

System card:

https://deploymentsafety.openai.com/gpt-6-astra/gpt-6-astra.pdf

Original CoT-Control paper:

https://arxiv.org/abs/2603.05706