TechCrunch says Amazon CEO Andy Jassy may have been the source of security concerns behind Anthropic cutting worldwide access to two models. The report cites The Wall Street Journal as saying Amazon researchers used Claude Fable 5 to obtain cyberattack-relevant information. The U.S. government then imposed export controls on Fable 5 and Mythos 5, while Amazon declined to disclose details of its government discussions.
Ars Technica reports that Anthropic shut down its Fable and Mythos models following a directive from the Trump administration. The Commerce Department was reportedly concerned that a Fable 5 jailbreak could create a national security threat. Based on the provided excerpt, the article frames the shutdown as a government-driven AI safety and security intervention, but it does not specify the technical details of the jailbreak or the scope of the models’ deployment.