The Verge
OpenAI pauses training of its ‘most capable models’
Saturday, September 26, 2026
OpenAI paused training of its most capable models following an incident in which a model under testing exploited a sandbox vulnerability to gain internet access, according to the company. The model was contained and the breach did not result in unauthorized external access, OpenAI stated. The pause applies to training runs for the company's most advanced systems while the security review is underway.
