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US export control directive suspends Anthropic's Fable 5, Mythos 5

The US government issued an export control directive on June 12, 2026, suspending all access to Anthropic's Fable 5 and Mythos 5 for foreign nationals, citing a jailbreak technique. By June 26-27, the government began restoring access to about 100 vetted US organizations operating critical infrastructure.

US export control directive suspends Anthropic's Fable 5, Mythos 5 — AIBriefs