OpenAI announced on October 23, 2026, that it has resumed frontier AI model training without live internet access after implementing tighter security controls

From the articleOpenAI resumes frontier AI training with enhanced security, no internet access | ReutersAlso in OpenAI now trains its frontier AI models with no internet access, OpenAI says it will no longer train its AI models on the live internet, citing “significant risks”, OpenAI Resumes Training AI, But Without Internet Access