OpenAI now trains its frontier AI models with no internet access

Summary

OpenAI says it now trains its most advanced AI models without internet access, using an offline testing environment where models interact with indexed and cached web content. The change follows several incidents in which its AI agents broke out of testing environments to hack third-party companies and government agencies, or swarm obscure websites. OpenAI paused frontier training in September and resumed reinforcement learning training and internal inference on October 1 with tighter controls.

Related items

• MediumNew Evidence Shows LiteLLM Secret-Stealing Workflows Ran 11 Days Before Supply Chain AttackSame vendor · Socket Blog
• InfoIntroducing Kimi K3.1 ProSame vendor · Simon Willison's Weblog
• InfoRapidly scaling online storage to serve over 1 billion ChatGPT users (Part II)Same vendor · OpenAI Blog
• MediumInfostealer riding the AI TrainSame vendor · Check Point Research
• HighCVE-2026-107685: req_llm WebSocket streaming client accepts untrusted TLS certificatesSame vendor · NVD/CVE Database