--- title: How Microsoft AI builds coding models optimized for... description: Microsoft researchers discuss MAI Code Flash, a 137B parameter mixture-of-experts model with only 5B active parameters, purpose-built for GitHub Copilot and VS... canonical: https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158 | daily.dev og:description: Microsoft researchers discuss MAI Code Flash, a 137B parameter mixture-of-experts model with only 5B active parameters, purpose-built for GitHub Copilot and VS... og:url: https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo og:image: https://api.daily.dev/og/posts/Cwbwd1KvO.png og:image:alt: How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158 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. # How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158 **[Visual Studio Code](https://daily.dev/sources/vscode)** · 16 min read · 0 upvotes · 0 comments ## Summary Microsoft researchers discuss MAI Code Flash, a 137B parameter mixture-of-experts model with only 5B active parameters, purpose-built for GitHub Copilot and VS Code. Unlike generic models adapted for code, it was trained from scratch for the Copilot workflow using supervised fine-tuning on progressively complex coding tasks, followed by reinforcement learning against real VS Code tooling and product harnesses. The model balances speed, cost, and intelligence for daily software engineering tasks across frontend and backend, and is being gradually rolled out in VS Code's model picker. Demos show multi-agent workflows combining MAI Code Flash with other MAI models for tasks like UI development, unit test generation, and component refactoring. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [MAI-Code-1.1-Flash available in GitHub Copilot](https://daily.dev/posts/mai-code-1-1-flash-available-in-github-copilot-b3ij55irv) · GitHub Changelog · 0 upvotes · 0 comments --- Tags: [#github](https://daily.dev/tags/github), [#reinforcement-learning](https://daily.dev/tags/reinforcement-learning), [#ai-assisted-development](https://daily.dev/tags/ai-assisted-development), [#mixture-of-experts](https://daily.dev/tags/mixture-of-experts) [View this post on daily.dev](https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo) ```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":"How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158","url":"https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo"},"datePublished":"2026-06-05T13:57:16.262Z","dateModified":"2026-06-18T21:22:59.210Z","description":"Microsoft researchers discuss MAI Code Flash, a 137B parameter mixture-of-experts model with only 5B active parameters, purpose-built for GitHub Copilot and VS...","image":"https://i.ytimg.com/vi/Agc6Ik00R1g/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/Agc6Ik00R1g/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Visual Studio Code","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":"Visual Studio Code","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/d5adab6ae9fb44d19859748fc30f5e18","url":"https://daily.dev/sources/vscode"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-microsoft-ai-builds-coding-models-optimized-for-github-copilot-live158-cwbwd1kvo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"github,reinforcement-learning,ai-assisted-development,mixture-of-experts","timeRequired":"PT16M","video":{"@type":"VideoObject","name":"How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158","description":"Microsoft researchers discuss MAI Code Flash, a 137B parameter mixture-of-experts model with only 5B active parameters, purpose-built for GitHub Copilot and VS...","thumbnailUrl":"https://i.ytimg.com/vi/Agc6Ik00R1g/sddefault.jpg","uploadDate":"2026-06-05T13:57:16.262Z","duration":"PT16M","url":"https://api.daily.dev/r/Cwbwd1KvO","embedUrl":"https://www.youtube.com/embed/Agc6Ik00R1g"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Visual Studio Code","item":"https://daily.dev/sources/vscode"},{"@type":"ListItem","position":3,"name":"How Microsoft AI builds coding models optimized for GitHub Copilot | LIVE158"}]} ```