OpenAI restarts frontier training—without internet access

OpenAI cutting internet access during frontier-model training signals how serious the security risks have become—and it could shape how safe (and how capable) future AI systems are. OpenAI says it resumed training its most advanced models after tightening security controls, including blocking internet access in the training environment. It also said its internal defenses testing surfaced a vulnerability in widely used software, highlighting how frontier AI work is now colliding with cybersecurity. The big question: can models stay powerful without being “online” during training? Watch for what changed, why OpenAI drew this line, and what it could mean next. New AI news every weekday — subscribe so you don't miss tomorrow's story. Referenced Links: OpenAI resumes frontier-model training after tightening security and restricting internet access OpenAI resumes frontier-model training after tightening security and restricting internet access (report) AI updates roundup (Craft, Decisions API, Agent Skills) 💬 Send Chuck a comment about this episode Support the show Want to go deeper with AI? A community of professionals is learning AI together right now at aihammock.com — show notes, links, tools, and real conversations about how to actually use AI in your life.