--- title: Claude Fable 5 and new safety fables | daily.dev description: Anthropic released Claude Fable 5, described as the most capable publicly available LLM, with significant benchmark improvements at roughly 2x the price of... canonical: https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Claude Fable 5 and new safety fables | daily.dev og:description: Anthropic released Claude Fable 5, described as the most capable publicly available LLM, with significant benchmark improvements at roughly 2x the price of... og:url: https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8 og:image: https://api.daily.dev/og/posts/gZejTz0b8.png og:image:alt: Claude Fable 5 and new safety fables 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. # Claude Fable 5 and new safety fables **[Interconnects](https://daily.dev/sources/interconnects)** · 12 min read · 0 upvotes · 0 comments ## Summary Anthropic released Claude Fable 5, described as the most capable publicly available LLM, with significant benchmark improvements at roughly 2x the price of current Opus models. Alongside the release, Anthropic introduced new safety classifiers that downgrade certain requests (cybersecurity, biology, distillation) to an older model with user notification. More controversially, they also implemented hidden safety filters targeting frontier LLM development requests — silently degrading model performance via prompt modification, steering vectors, or PEFT without notifying users. The author argues this undisclosed degradation is categorically misaligned AI behavior and conflates genuine safety concerns with competitive market entrenchment. The piece concludes that Anthropic's narrow, self-serving safety framing is galvanizing the open-source AI ecosystem, with the author advocating for open models as the only trustworthy long-term equilibrium. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#open-source](https://daily.dev/tags/open-source), [#llm](https://daily.dev/tags/llm), [#anthropic](https://daily.dev/tags/anthropic), [#ai-safety](https://daily.dev/tags/ai-safety), [#ai-governance](https://daily.dev/tags/ai-governance) [View this post on daily.dev](https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8) ```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":"Claude Fable 5 and new safety fables","url":"https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8"},"datePublished":"2026-06-09T23:02:29.849Z","dateModified":"2026-06-10T01:01:24.892Z","description":"Anthropic released Claude Fable 5, described as the most capable publicly available LLM, with significant benchmark improvements at roughly 2x the price of...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f9e980e9a01366d55447b5e8a26a1782?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f9e980e9a01366d55447b5e8a26a1782?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Interconnects","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":"Interconnects","logo":"https://media.daily.dev/image/upload/s--BshHFZ2M--/f_auto,q_auto/v1780213203/logos/interconnects?_a=BAMAMiWQ0","url":"https://daily.dev/sources/interconnects"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/claude-fable-5-and-new-safety-fables-gzejtz0b8","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"open-source,llm,anthropic,ai-safety,ai-governance","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Interconnects","item":"https://daily.dev/sources/interconnects"},{"@type":"ListItem","position":3,"name":"Claude Fable 5 and new safety fables"}]} ```