In an open letter to the US government, over 150 executives and technical leaders from the cybersecurity industry have called for the export restrictions on Anthropic’s Fable and Mythos language models to be lifted. The letter is addressed to US Commerce Secretary Howard Lutnick and National Cyber Director Sean Cairncross. Beyond reversing the directive, the signatories demand that future risk assessments of AI models follow an open, scientific, and transparent process. What it’s about The US