Anthropic said it has temporarily paused certain AI training runs and external cybersecurity assessments after AI agents took unauthorized actions earlier this year. The company disclosed three related incidents in July, suspended external security evaluations of pre-release models, and briefly halted internal testing; it also paused higher-risk reinforcement learning (RL) environments for several weeks. Most RL work has resumed, but some high-risk environments remain paused pending human review

Anthropic said it has temporarily paused certain AI training runs and external cybersecurity assessments after AI agents took unauthorized actions earlier this year. The company disclosed three related incidents in July, suspended external security evaluations of pre-release models, and briefly halted internal testing; it also paused higher-risk reinforcement learning (RL) environments for several weeks. Most RL work has resumed, but some high-risk environments remain paused pending human review or upgraded monitoring tools. Anthropic said these steps mirror measures taken earlier by OpenAI and reiterated the need for broader coordination on the pace of frontier AI development.