Trump Administration Blocks Anthropic's Claude Mythos and Fable 5 Models
Tags AI · Infrastructure · Enterprise
The Trump administration ordered Anthropic to pull its two newest AI models — Claude Mythos and Fable 5 — offline, citing undisclosed national security concerns. The action followed Amazon CEO Andy Jassy raising concerns with the White House after Amazon researchers reportedly found ways to bypass Fable 5's guardrails. The administration's letter told Anthropic the models could not be used by foreign nationals. Cybersecurity experts signed an open letter calling the order dangerous, arguing it removes advanced cybersecurity capabilities from US network defenders. Anthropic had previously been labeled a supply chain risk by the government and is engaged in ongoing litigation with the White House.
Technical significance
This is the first time the US government has used export control orders to restrict access to a domestic AI company's models. The precedent is significant: it means any AI model can be pulled from the market based on undisclosed national security rationale, with no clear appeals process. Competitors like OpenAI and Google may benefit, but the broader chilling effect on AI deployment and open-weight model distribution could be substantial.