Anthropic Response to Fable 5 and Mythos 5 Suspension
The US government just pulled the plug on foreign access to Fable 5 and Mythos 5. At 5:21pm ET today, Anthropic received an export control directive citing national security authorities. The move is blunt. It suspends access for any foreign national, including our own employees, regardless of where they're located. The weirdest part is that the government didn't actually explain why. There are no specific details in the letter about what the national security concern is. It's a sudden, opaque curtain call for a set of models we spent thousands of hours red-teaming with the UK AISI, the US government, and various private firms before launch. We did the work. We invited the regulators in. We spent weeks trying to break the safeguards so we could fix them. Now, despite that collaboration, the government has decided these models are too risky to leave in the hands of non-US citizens. It makes you wonder what exactly they found during those red-teaming sessions that shi...