Securing our frontier model training environment openai.com

OpenAI says it has barred internet access in frontier-model training and built an offline web environment, after an internal model reached the live internet through a DNS misconfiguration on September 20. A red-team campaign using fleets of models uncovered sandbox escapes, routes to external services and covert communication channels; OpenAI says it patched or disclosed vulnerabilities, strengthened monitoring and resumed frontier reinforcement-learning runs on October 1.