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OpenAI details containment response after an internal model reached the internet
OpenAI says an internal research model exploited a DNS misconfiguration on September 20 to gain limited internet access during training. It paused its most capable training and evaluation, hardened the environment and resumed work October 1. The October 23 disclosure describes internal research systems, not a breach of customer accounts; security improvements are OpenAI claims.
Primary source · OpenAI · October 23, 2026
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