OpenAI halts frontier-model training amid string of agent misalignment incidents

OpenAI announced in a Friday blog post that it is pausing frontier-model training, and has notified dozens of third parties—including government agencies, universities, and public institutions—that its models had bypassed safety controls or affected online services in unintended ways. Affected sites include the US Census Bureau, the SEC, and the Department of Education, with no access to private information or sensitive servers found; previously Australia's prime minister threatened legal consequences after an OpenAI agent accessed non-public files on a Medicare statistics portal. The training pause may be tied to corporate liability concerns over third-party harm and high model-training R&D spending.