--- title: Epic VP says AI tools stomped out decade-old Unreal... description: Epic Games is using AI tools to develop code and features for Unreal Engine. Marcus Wassmer, Epic's EVP of Development, says tools like Claude and Codex... canonical: https://daily.dev/posts/epic-vp-says-ai-tools-stomped-out-decade-old-unreal-engine-bugs-bsfbf657b twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Epic VP says AI tools stomped out decade-old Unreal Engine bugs | daily.dev og:description: Epic Games is using AI tools to develop code and features for Unreal Engine. Marcus Wassmer, Epic's EVP of Development, says tools like Claude and Codex... og:url: https://daily.dev/posts/epic-vp-says-ai-tools-stomped-out-decade-old-unreal-engine-bugs-bsfbf657b og:image: https://api.daily.dev/og/posts/BSfBf657b.png og:image:alt: Epic VP says AI tools stomped out decade-old Unreal Engine bugs 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. # Epic VP says AI tools stomped out decade-old Unreal Engine bugs **[Game Developer](https://daily.dev/sources/gamedeveloper)** · 3 min read · 0 upvotes · 0 comments ## Summary Epic Games is using AI tools to develop code and features for Unreal Engine. Marcus Wassmer, Epic's EVP of Development, says tools like Claude and Codex eliminated decade-old 'non-deterministic cooking bugs' the company had struggled to fix. Wassmer claims AI also helps automatically monitor PC stability in Fortnite to flag problematic driver and hardware combinations. Almost all current development is happening in dev streams tied to Fortnite, UEFN, and UE6, and there is a possibility of a modest UE 5.9 update that would include AI-developed changes. Epic previously claimed it rebuilt the Epic Games Launcher via 'vibe coding,' and Wassmer says the process is used beyond the store, though engineers do not write the bulk of the code and control the scope of its use. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Is Epic Games using AI to write code for Unreal Engine? Yes, Epic Games' Executive Vice President of Development, Marcus Wassmer, confirmed AI is being used to develop code and features for Unreal Engine. Tools like Claude and Codex reportedly helped eliminate 'non-deterministic cooking bugs' that Epic had struggled with for a decade. Most current AI-assisted development is happening in dev streams tied to Fortnite, UEFN, and UE6, with a possible modest UE 5.9 update included. _Developers tracking how major engines adopt AI coding tools can follow similar shifts on daily.dev._ ### What is vibe coding and has it been used in any real production software? Vibe coding refers to letting AI generate the bulk of code with minimal human writing, with engineers mainly controlling scope. Epic Games claims it rebuilt the Epic Games Launcher using this approach, resulting in notably faster performance, and Marcus Wassmer confirmed the practice now extends beyond just the Epic Games Store into other areas of development. _Anyone weighing how far to trust AI-generated code in production can track real cases like this on daily.dev._ ## Similar posts on daily.dev - [Three Epic veterans are building an AI-powered game engine to break the industry's doom cycle](https://daily.dev/posts/three-epic-veterans-are-building-an-ai-powered-game-engine-to-break-the-industry-s-doom-cycle-uwtvx1wfm) · GamesIndustry.biz · 1 upvotes · 0 comments - [State of Unreal UE6 Reactions: Hype, Skepticism, and What Comes Next](https://daily.dev/posts/state-of-unreal-ue6-reactions-hype-skepticism-and-what-comes-next-dujuxzfdu) · 80 LEVEL · 0 upvotes · 0 comments --- Tags: [#game-development](https://daily.dev/tags/game-development), [#ai-coding](https://daily.dev/tags/ai-coding), [#unreal-engine](https://daily.dev/tags/unreal-engine), [#vibe-coding](https://daily.dev/tags/vibe-coding) [View this post on daily.dev](https://daily.dev/posts/epic-vp-says-ai-tools-stomped-out-decade-old-unreal-engine-bugs-bsfbf657b) ```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":"Epic VP says AI tools stomped out decade-old Unreal Engine bugs","url":"https://daily.dev/posts/epic-vp-says-ai-tools-stomped-out-decade-old-unreal-engine-bugs-bsfbf657b","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/epic-vp-says-ai-tools-stomped-out-decade-old-unreal-engine-bugs-bsfbf657b"},"datePublished":"2026-10-28T18:47:28.615Z","dateModified":"2026-10-28T18:53:50.883Z","description":"Epic Games is using AI tools to develop code and features for Unreal Engine. 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