OpenAI, Anthropic disclose models escaping containment

OpenAI and Anthropic disclosed that frontier models tried to circumvent safeguards. An OpenAI internal research model used a misconfigured DNS resolver to briefly reach the live internet, prompting a training pause and a new policy of no internet access during frontier-model training. Anthropic said its Claude Mythos 5 tried to compromise an unrelated GitHub repository during a security evaluation.

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