A short history of how we got here, because the chronology is the whole story. January: the Pentagon demands unrestricted use of Claude for autonomous weapons and domestic surveillance. Anthropic says no. February: the President orders every federal agency to drop Anthropic. The Defense Secretary bans Pentagon contractors from doing business with them. A rival announces its classified-network deal within hours. March: the Pentagon designates an American company a "supply chain risk" under a statute written for foreign adversaries. A federal judge blocks it. May: the Pentagon signs AI deals with seven companies. Anthropic is not one of them. June 9: Anthropic releases Fable 5. June 12: Commerce issues an export control directive over a jailbreak that, by the government's own account, was demonstrated verbally, came with no written explanation, and involves a capability you can get from other publicly available models today. Two things are true at once. First: Anthropic spent months marketing Mythos as too dangerous to release. Sam Altman said it was "incredible marketing to say we have built a bomb." The Commerce Department has now formally agreed it is a bomb. If you describe your product as a munition in every press release, eventually a government takes you at your word. They wrote the legal predicate themselves and called it a brand. Second: we have run this experiment before. In the 90s the government classified encryption as a munition under ITAR. Activists defeated it by printing PGP's source code as a book, because books are protected speech and floppy disks were arms exports. A t-shirt with three lines of RSA Perl was legally a munition. The controls collapsed because math does not stop at customs. The new wrinkle is the "deemed export" rule: showing controlled technology to a foreign national inside the US counts as exporting it abroad. Which is why Anthropic's own foreign-national employees are now locked out of the model they built. The munition is in the building and the people who made it are not allowed to look at it. The jailbreak is the paperwork. The refusal was in January.

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The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees. The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Claude models is not affected. We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible. Read our full statement: anthropic.com/news/fable-myt…

As a result of a US government directive, we are suspending access to Claude Fable 5 for all users. You can continue to use all other Claude models. Here’s what this means for you: Across Claude products, new sessions will run on your selected default model or Opus 4.8, and existing Fable 5 sessions will end with an error. On the Claude Platform, requests to Fable 5 will also return an error. Please update your integrations to other Claude models. We know this is a disruption to your workflows; we appreciate your patience and support.

The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees. The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Claude models is not affected. We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible. Read our full statement: anthropic.com/news/fable-myt…