Claude Fable 5 and Mythos 5

2 models from Anthropic

Security

US government directive forces suspension of Fable 5 and Mythos 5

A US government export control directive, prompted by a reported method of bypassing Fable 5 safeguards found by Amazon researchers, led Anthropic to disable Fable 5 and Mythos 5 for all customers. Other models were not affected.

Who is affected:
All users of Claude Fable 5 and Claude Mythos 5 on every surface.
Action needed:
Switch to Claude Opus 4.8 until access returns.

Source

"The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance."

Anthropic news: Statement on the directive to suspend Fable 5 access

Published

Open the sourceanthropic.com

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