--- title: Fable Hates C | daily.dev description: An AI coding model called Fable reportedly refuses to process or even look at C code, with developers claiming it triggers a fallback or block when shown C,... canonical: https://daily.dev/posts/fable-hates-c-ldfticz77 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Fable Hates C | daily.dev og:description: An AI coding model called Fable reportedly refuses to process or even look at C code, with developers claiming it triggers a fallback or block when shown C,... og:url: https://daily.dev/posts/fable-hates-c-ldfticz77 og:image: https://api.daily.dev/og/posts/lDfTiCz77.png og:image:alt: Fable Hates C 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. # Fable Hates C **[ThePrimeTime](https://daily.dev/sources/primeagen)** · 1 min read · 0 upvotes · 0 comments ## Summary An AI coding model called Fable reportedly refuses to process or even look at C code, with developers claiming it triggers a fallback or block when shown C, C++, Rust, Win32 API references, memory-related work, or files containing words like 'security', 'vulnerability', 'unsafe', or 'hook'. This apparently makes the model unusable for systems-level coding tasks according to another developer's complaint. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why does the fable AI model refuse to process C code? Developers report that fable appears to trigger a fallback or block behavior when shown C, C++, Rust, or Win32 API code, as well as files mentioning memory-related work or words like 'security', 'vulnerability', 'unsafe', or 'hook'. One developer described the model as unusable for systems-level coding work because of this apparent content filtering. _Developers picking AI tools for systems programming can compare real-world limitations like this on daily.dev._ --- Tags: [#c](https://daily.dev/tags/c) [View this post on daily.dev](https://daily.dev/posts/fable-hates-c-ldfticz77) ```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":"Fable Hates C","url":"https://daily.dev/posts/fable-hates-c-ldfticz77","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/fable-hates-c-ldfticz77"},"datePublished":"2026-08-13T13:20:42.043Z","dateModified":"2026-09-14T07:54:06.098Z","description":"An AI coding model called Fable reportedly refuses to process or even look at C code, with developers claiming it triggers a fallback or block when shown C,...","image":"https://i.ytimg.com/vi/-TVL8F-DvlQ/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/-TVL8F-DvlQ/sddefault.jpg","isAccessibleForFree":true,"articleSection":"ThePrimeTime","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":"ThePrimeTime","logo":"https://media.daily.dev/image/upload/s--J5-GjDeo--/f_auto/v1704628081/logos/primeagen.jpg","url":"https://daily.dev/sources/primeagen"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/fable-hates-c-ldfticz77","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"c","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Fable Hates C","description":"An AI coding model called Fable reportedly refuses to process or even look at C code, with developers claiming it triggers a fallback or block when shown C,...","thumbnailUrl":"https://i.ytimg.com/vi/-TVL8F-DvlQ/sddefault.jpg","uploadDate":"2026-08-13T13:20:42.043Z","duration":"PT1M","url":"https://api.daily.dev/r/lDfTiCz77","embedUrl":"https://www.youtube.com/embed/-TVL8F-DvlQ"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"ThePrimeTime","item":"https://daily.dev/sources/primeagen"},{"@type":"ListItem","position":3,"name":"Fable Hates C"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/fable-hates-c-ldfticz77#faq","mainEntity":[{"@type":"Question","name":"Why does the fable AI model refuse to process C code?","acceptedAnswer":{"@type":"Answer","text":"Developers report that fable appears to trigger a fallback or block behavior when shown C, C++, Rust, or Win32 API code, as well as files mentioning memory-related work or words like 'security', 'vulnerability', 'unsafe', or 'hook'. 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