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US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide

The US government has ordered Anthropic to shut down global access to Fable 5 and Mythos 5, citing alleged jailbreak risks. Anthropic is complying but pushing back publicly: the vulnerabilities are minor and exist in competing models like GPT-5.5, the company says, an ironic turn after the company spent months hyping the cybersecurity risks of its own Mythos class. Anthropic warns the move could set a precedent that halts all frontier deployments. The article US government forces Anthro

US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide
Primary source the-decoder.com ↗

Published June 13, 2026 · Category: AI Briefing

Overview

The US government has ordered Anthropic to shut down global access to Fable 5 and Mythos 5, citing alleged jailbreak risks. Anthropic is complying but pushing back publicly: the vulnerabilities are minor and exist in competing models like GPT-5.5, the company says, an ironic turn after the company spent months hyping the cybersecurity risks of its own Mythos class. Anthropic warns the move could set a precedent that halts all frontier deployments.

Details

The article US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide appeared first on The Decoder.

Source

Originally published at the-decoder.com.

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