Anthropic Shuts Down Models Amidst Security Tensions with Trump Administration

In a significant escalation of government oversight, Anthropic has abruptly terminated access to its recently launched Fable 5 and Mythos 5 models. This decision follows a formal directive from the US Commerce Department, which has subjected the new models to rigorous export controls. Anthropic indicated that disabling these models for all customers was the only immediate means of ensuring compliance with the administrative mandate. Central to the government's intervention is a purported jailbreak capable of circumventing classifier-based safeguards. These protections were specifically engineered to prevent users from generating content related to cybersecurity, chemistry, and biology. An administration official indicated that the suspension provides essential time for the national security apparatus to be hardened against such vulnerabilities—a process anticipated to conclude within several weeks. Despite its compliance, Anthropic has expressed profound disagreement with the government’s stance. The company revealed that the administration had only provided verbal evidence of a narrow, non-universal jailbreak involving the review of codebase for minor software vulnerabilities. Anthropic maintains that these capabilities are not unique to its models, citing GPT-5.5 as having comparable functionality. They further cautioned that applying such a stringent standard could potentially paralyze the deployment of frontier models across the entire AI industry. This directive arrives on the heels of an executive order signed by President Trump, which encourages AI manufacturers to undergo voluntary security assessments. Anthropic has categorized the resulting disruption as a misunderstanding and has offered an apology to its global user base. While the company intends to release further details within 24 hours, the immediate removal of Fable 5 and Mythos 5 remains in effect. Notably, access to Anthropic’s other existing models remains unaffected, though the incident has ignited a broader debate regarding the intersection of commercial innovation and national security requirements.