Anthropic completely shut off access to its Mythos 5 and Fable 5 models Friday night, just days after they were launched.<\/p>\n
The move comes after Anthropic\u2019s receipt of a US Commerce Department directive Friday evening, subjecting the new models to export controls restricting their use anywhere outside the United States. In a message posted Friday night<\/a>, Anthropic said the only way for it to ensure compliance with that government order in the immediate term \u201cis that we must abruptly disable Fable 5 and Mythos 5 for all our customers.\u201d Access to other Anthropic models is not affected.<\/p>\n An Axios report<\/a> cited an administration official saying that the administration is concerned by reports of a jailbreak that reportedly gets around broad classifier-based safeguards<\/a> meant to block Fable 5 prompts regarding cybersecurity, chemistry, and biology. The administration reportedly requested a pause in the release of these models to gain time for the \u201cnational security apparatus\u201d to be \u201chardened\u201d against this kind of threat. That hardening could be complete \u201cin the next few weeks,\u201d Axios\u2019 source suggested.<\/p>\n In its Friday night announcement post, Anthropic said the government has only provided it with \u201cverbal evidence of a potential narrow, non-universal jailbreak\u201d that involves getting Fable 5 to review a specific codebase for software flaws. The company says it has only seen evidence of this kind of jailbreak being used to find \u201cminor\u201d and \u201crelatively simple\u201d software vulnerabilities, and that other publicly available models like GPT-5.5 has similar capabilities on this score.<\/p>\n","protected":false},"excerpt":{"rendered":"Anthropic completely shut off access to its Mythos 5 and Fable 5 models Friday night, just days after…\n","protected":false},"author":2,"featured_media":701229,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[28],"class_list":["post-701228","post","type-post","status-publish","format-standard","has-post-thumbnail","category-business","tag-business"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/701228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=701228"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/701228\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/701229"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=701228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=701228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=701228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}