2026-06-15原文1 min readUpdated: 2026-06-15

"They screwed us": Personality clashes sent Anthropic's models offline

An Axios piece reveals that personality clashes between Anthropic and the US government led to the shutdown of its AI models (Mythos and Fable) under export controls. Sources suggest solutions include making models jailbreak-proof or improving attitudes.

SourceSimon Willison's Weblog

Simon Willison’s Weblog

15th June 2026 - Link Blog

"They screwed us": Personality clashes sent Anthropic's models offline. Lots of "source familiar with the administration's thinking" and "source close to Anthropic" in this Axios piece, which is the best collection of behind-the-scenes gossip I've seen about the US government export control Mythos/Fable story so far.

Logan Graham, Dave Orr and blog favorite Nicholas Carlini are supposedly meeting with the Commerce Department today in D.C. Good luck to them!

This closing notes doesn't give me much optimism that we'll be getting Fable back any time soon:

The bottom line: One option is to make sure Anthropic's models can't be jailbroken — though perfect jailbreak resistance may be impossible.

Absent that, a source familiar with the administration's thinking said it may simply come down to an attitude fix where, instead of feeling dismissed, "everyone feels safe, secure and happy."

I wonder if Anthropic ever successfully addressed the class of attacks describe in the Universal and Transferable Adversarial Attacks on Aligned Language Models paper from 2023.