--- title: BREAKING: Fable and Mythos have been taken down for... description: The US government has issued an export control directive suspending all access to Anthropic's Claude 4 (referred to as 'Fable 5') and a related model ('Mythos... canonical: https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: BREAKING: Fable and Mythos have been taken down for security concerns. | daily.dev og:description: The US government has issued an export control directive suspending all access to Anthropic's Claude 4 (referred to as 'Fable 5') and a related model ('Mythos... og:url: https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x og:image: https://api.daily.dev/og/posts/AxmTYvV7X.png og:image:alt: BREAKING: Fable and Mythos have been taken down for security concerns. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # BREAKING: Fable and Mythos have been taken down for security concerns. **[Theo - t3․gg](https://daily.dev/sources/t3dotgg)** · 14 min read · 68 upvotes · 15 comments ## Summary The US government has issued an export control directive suspending all access to Anthropic's Claude 4 (referred to as 'Fable 5') and a related model ('Mythos 5') for foreign nationals, citing national security concerns about a potential jailbreak method. Anthropic is complying but publicly disagrees, arguing the jailbreak was narrow and non-universal, and that other publicly available models including GPT-4.5 can discover the same vulnerabilities. The takedown affects all customers globally while Anthropic works to implement citizenship verification. Anthropic warns that applying this standard industry-wide would essentially halt all frontier model deployments. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@tsuyoshi64** · 6 upvotes > Things just got crazier **@friedrich** · 4 upvotes > What a time to be alive **@mdshafinahmed** · 3 upvotes > It was aspected. **@confidentcoding** · 3 upvotes >  **@adityamghosh** · 3 upvotes > It's just a PR/Marketing stunt. --- Tags: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript), [#react](https://daily.dev/tags/react), [#typescript](https://daily.dev/tags/typescript) [View this post on daily.dev](https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"BREAKING: Fable and Mythos have been taken down for security concerns.","url":"https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x"},"datePublished":"2026-06-13T02:21:51.124Z","dateModified":"2026-06-17T15:51:44.492Z","description":"The US government has issued an export control directive suspending all access to Anthropic's Claude 4 (referred to as 'Fable 5') and a related model ('Mythos...","image":"https://i.ytimg.com/vi/W-kM56mf-Nw/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/W-kM56mf-Nw/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Theo - t3․gg","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Theo - t3․gg","logo":"https://media.daily.dev/image/upload/s--UmX7IyU3--/f_auto/v1704628081/logos/t3dotgg.jpg","url":"https://daily.dev/sources/t3dotgg"},"commentCount":15,"discussionUrl":"https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":68},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":15}],"keywords":"webdev,javascript,react,typescript","timeRequired":"PT14M","video":{"@type":"VideoObject","name":"BREAKING: Fable and Mythos have been taken down for security concerns.","description":"The US government has issued an export control directive suspending all access to Anthropic's Claude 4 (referred to as 'Fable 5') and a related model ('Mythos...","thumbnailUrl":"https://i.ytimg.com/vi/W-kM56mf-Nw/sddefault.jpg","uploadDate":"2026-06-13T02:21:51.124Z","duration":"PT14M","url":"https://api.daily.dev/r/AxmTYvV7X","embedUrl":"https://www.youtube.com/embed/W-kM56mf-Nw"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Theo - t3․gg","item":"https://daily.dev/sources/t3dotgg"},{"@type":"ListItem","position":3,"name":"BREAKING: Fable and Mythos have been taken down for security concerns."}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/breaking-fable-and-mythos-have-been-taken-down-for-security-concerns--axmtyvv7x","comment":[{"@type":"Comment","text":"Things just got crazier","datePublished":"2026-06-13T03:18:53.371Z","url":"https://daily.dev/posts/AxmTYvV7X#c-IbexvLWDh","author":{"@type":"Person","name":"Tsuyoshi","url":"https://daily.dev/tsuyoshi64","image":"https://avatars.githubusercontent.com/u/284280715?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":6}},{"@type":"Comment","text":"What a time to be alive","datePublished":"2026-06-13T14:49:24.338Z","url":"https://daily.dev/posts/AxmTYvV7X#c-DI1eWcukB","author":{"@type":"Person","name":"Friedrich WT","url":"https://daily.dev/friedrich","image":"https://avatars.githubusercontent.com/u/136119888?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":4}},{"@type":"Comment","text":"It was aspected.","datePublished":"2026-06-13T14:47:04.014Z","url":"https://daily.dev/posts/AxmTYvV7X#c-GfEBBpW33","author":{"@type":"Person","name":"Md. Shafin Ahmed","url":"https://daily.dev/mdshafinahmed","image":"https://media.daily.dev/image/upload/s---a0uwu1i--/f_auto/v1783046504/avatars/avatar_u8iR8DacSYjsphyDqQTQ9?_a=BAMAMicg0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"","datePublished":"2026-06-14T20:45:53.484Z","url":"https://daily.dev/posts/AxmTYvV7X#c-sbN1emRNZ","author":{"@type":"Person","name":"Lars Faye | Confident Coding","url":"https://daily.dev/confidentcoding","image":"https://media.daily.dev/image/upload/s--OGZu5DEc--/f_auto/v1772569630/avatars/avatar_umWZ9aQAng34qk5aaJl2q?_a=BAMAMiiu0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"It’s just a PR/Marketing stunt.","datePublished":"2026-06-14T02:04:21.902Z","url":"https://daily.dev/posts/AxmTYvV7X#c-Rw1lGM4ED","author":{"@type":"Person","name":"Adityam Ghosh","url":"https://daily.dev/adityamghosh","image":"https://media.daily.dev/image/upload/s--5-76_VkZ--/f_auto/v1779949029/avatars/avatar_3PZj17Mlq7s6UsH8sBMIy?_a=BAMAMiWQ0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}}]} ```