US Department of Commerce

Anthropic announced that export controls on Fable 5 and Mythos 5 had been lifted and that Fable 5 would be redeployed globally from July 1, 2026 with an improved safety classifier. Anthropic says the classifier blocks the technique described in an Amazon report in over 99% of cases and that CAISI researchers tested its prior and new safeguards. Mythos 5 access was restored for a set of US organizations after government approval on June 26.

Anthropic said the US government issued an export control directive, citing national security authorities, barring access to Fable 5 and Mythos 5 by foreign nationals, after officials said they had found a way to jailbreak Fable 5's safeguards. Anthropic said the net effect was that it had to disable both models for all customers to comply, while other Claude models stayed available. Anthropic disputed the rationale, arguing the demonstrated vulnerabilities were minor and that the standard applied industry-wide would halt new frontier deployments.

Commerce Secretary Howard Lutnick announced the US AI Safety Institute would become the Center for AI Standards and Innovation (CAISI) within NIST. CAISI was tasked with voluntary agreements with developers and unclassified evaluations focused on demonstrable risks such as cybersecurity, biosecurity and chemical weapons, plus assessment of adversary AI systems for backdoors and other security vulnerabilities.