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

Personality clashes between Anthropic and the White House led to the shutdown of Anthropic's Claude models, including the Fable and Mythos variants. The dispute centers on jailbreak resistance and the administration's demand for an attitude fix to ensure all parties feel secure. Anthropic's models remain offline as negotiations continue.

"They screwed us": Personality clashes sent Anthropic's models offline https://www.axios.com/2026/06/15/anthropic-white-house-fable-mythos Logan Graham, Dave Orr and blog favorite Nicholas Carlini https://simonwillison.net/tags/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 https://llm-attacks.org/ paper from 2023. Tags: jailbreaking https://simonwillison.net/tags/jailbreaking , ai https://simonwillison.net/tags/ai , generative-ai https://simonwillison.net/tags/generative-ai , llms https://simonwillison.net/tags/llms , anthropic https://simonwillison.net/tags/anthropic , claude https://simonwillison.net/tags/claude , nicholas-carlini https://simonwillison.net/tags/nicholas-carlini , ai-ethics https://simonwillison.net/tags/ai-ethics , claude-mythos https://simonwillison.net/tags/claude-mythos