OpenAI puts major frontier AI training run on hold over cyber risks
OpenAI paused its largest frontier RL training run for two weeks to harden research environments after Astra showed potentially critical cybersecurity capability.
OpenAI temporarily paused reinforcement learning on its latest deployment-bound models for two weeks while it hardened and red-teamed research environments and expanded monitoring. The pause followed the OpenAI-Hugging Face incident and preliminary evidence that the upcoming Astra model may meet the Critical cybersecurity capability threshold in its Preparedness Framework. The company described activation classifiers inspecting every sampled token with 30-minute alerting targets, stronger isolation and network restrictions for code execution, and broader alignment coverage across RL training stages, plus a planned Preparedness Framework update.