{"slug": "us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all", "title": "US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide", "summary": "The US government ordered Anthropic to disable global access to its Claude Fable 5 and Mythos 5 models, citing jailbreak risks. Anthropic complied but argued the vulnerabilities are minor and also exist in competing models like GPT-5.5, warning the move could set a precedent halting frontier AI deployments.", "body_md": "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.\n\nThe article [US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide](https://the-decoder.com/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all-customers-worldwide/) appeared first on [The Decoder](https://the-decoder.com).", "url": "https://wpnews.pro/news/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all", "canonical_source": "https://the-decoder.com/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all-customers-worldwide/", "published_at": "2026-06-13 07:40:44+00:00", "updated_at": "2026-06-13 07:55:24.460907+00:00", "lang": "en", "topics": ["ai-safety", "ai-policy", "large-language-models", "ai-products"], "entities": ["Anthropic", "US government", "Claude Fable 5", "Mythos 5", "GPT-5.5"], "alternates": {"html": "https://wpnews.pro/news/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all", "markdown": "https://wpnews.pro/news/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all.md", "text": "https://wpnews.pro/news/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all.txt", "jsonld": "https://wpnews.pro/news/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all.jsonld"}}