Anthropic abruptly shut down access to its newly launched Fable 5 and Mythos 5 models on Friday night, following a US Commerce Department directive that subjected the models to export controls restricting their use outside the United States. The company stated that immediate compliance required disabling the models for all customers.
The Trump administration reportedly acted on concerns about a jailbreak that bypassed safeguards designed to block prompts on cybersecurity, chemistry, and biology. The administration requested a pause to allow time for the national security apparatus to be hardened against this threat, a process expected to take a few weeks.
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