Pentagon Signs Classified AI Deals with Seven Companies — GPT-5.5 and Mythos Can Now Automate Cyber Tasks on Classified Networks

The Washington Post·high signal

The U.S. Defense Department announced deals with seven leading AI companies to deploy frontier models on classified Pentagon networks. David Sacks stated that Anthropic's Mythos and OpenAI's GPT-5.5-Cyber can now automate cyber tasks, predicting all frontier models will reach this level within six months. This marks the largest single deployment of commercial AI into classified government infrastructure.