US orders Anthropic to pull a frontier AI model over a 'jailbreak': vital security move, or disproportionate overreach?
Anthropic disabled two newly launched AI models — Claude Fable 5 and the underlying Mythos 5 — to comply with a US export-control directive citing national security; its other models, including Claude Opus 4.8, are unaffected. New reporting sharpens the dispute: the White House's move was reportedly driven by suspicions that a China-linked group had gained access to Mythos, which officials fear could be reverse-engineered. Anthropic says the trigger it was told about was a narrow, minor 'jailbreak' replicable on other uncontrolled models, calls the recall disproportionate, and is fighting to reverse it.
The summary above is a neutral framing. Below, each side reports the same story in its own words — judge for yourself.
The US government issued an export-control directive suspending foreign access to Fable 5 and the Mythos model behind it. According to a Semafor report, the decision was driven in part by White House suspicions that a group linked to China had accessed Mythos — which, if true, officials consider a serious national-security risk, since a hostile state could try to reverse-engineer the model (e.g. by 'distilling' it into a copycat AI). Washington frames the controls as keeping frontier cyber-capable AI out of adversary hands; the episode follows the Defense Department earlier labeling Anthropic a 'supply chain risk.'
Anthropic says it complied — taking the models offline for everyone to be safe — but disagrees with the order, which it received at 5:21pm ET in a letter that 'did not provide specific details' of the security concern. The company argues the cited jailbreak is narrow, exposes only minor, previously known vulnerabilities, and can be reproduced on other publicly available models such as OpenAI's GPT-5.5 that face no such controls. Recalling a model used by 'hundreds of millions' over a narrow jailbreak, it warns, would 'essentially halt all new model deployments' across the industry; it calls the matter a misunderstanding and is working to restore access.
