--- title: Kotlin K2 Mode: Improving Performance and Integration in... description: IntelliJ IDEA 2025.1 introduces the K2 mode, a major enhancement for Kotlin support featuring a robust analysis engine and the new Kotlin Analysis API for... canonical: https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Kotlin K2 Mode: Improving Performance and Integration in IntelliJ IDEA | daily.dev og:description: IntelliJ IDEA 2025.1 introduces the K2 mode, a major enhancement for Kotlin support featuring a robust analysis engine and the new Kotlin Analysis API for... og:url: https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb og:image: https://api.daily.dev/og/posts/I5QBzoAQB.png og:image:alt: Kotlin K2 Mode: Improving Performance and Integration in IntelliJ IDEA 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. # Kotlin K2 Mode: Improving Performance and Integration in IntelliJ IDEA **[Collections](https://daily.dev/sources/collections)** · 2 min read · 2 upvotes · 0 comments ## Summary IntelliJ IDEA 2025.1 introduces the K2 mode, a major enhancement for Kotlin support featuring a robust analysis engine and the new Kotlin Analysis API for improved performance and integration. The release also includes full support for Java 24, Kotlin notebooks, JetBrains AI enhancements, and improved debugging and terminal architecture. ## Content IntelliJ IDEA 2025.1 has made significant strides in enhancing productivity, code quality, and user comfort with its latest release. One of the most notable features is the introduction of K2 mode as the default implementation for Kotlin support. This mode brings a robust and performant analysis engine designed to improve integration between the Kotlin compiler and the IDE. ### The Evolution of K2 Mode The story behind K2 mode reveals a dedicated effort to refine Kotlin's semantic code analysis. Traditional methods of supporting language features in both the compiler and the IDE were complex and often limited in performance. K2 mode addresses these challenges through phased resolutions and concurrency, aiming to enhance code analysis. ### Key Components and Benefits K2 mode leverages the new Kotlin Analysis API, which simplifies plugin development and debugging. This API, alongside the advanced analysis engine, significantly boosts performance and reliability, offering full support for the latest Kotlin language features. As a result, the user experience is greatly enhanced within the IDE. ### IntelliJ IDEA 2025.1 Highlights In addition to K2 mode, IntelliJ IDEA 2025.1 includes full support for Java 24, Kotlin notebooks, and numerous enhancements to JetBrains AI. The release also features improved debugging support, a new terminal architecture, better Scala support, and various upgrades to build tools and version control systems. ### User Feedback and Future Development Despite being in active development, K2 mode is now available in both IntelliJ IDEA and Android Studio. Users are encouraged to provide feedback on their experience to help refine and optimize this mode for future releases. K2 mode is set to become the standard for integrating advanced Kotlin and IDE features moving forward. In summary, IntelliJ IDEA 2025.1's introduction of the K2 mode marks a significant advancement in Kotlin support, offering developers a more reliable, performant, and user-friendly coding environment. ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#devtools](https://daily.dev/tags/devtools), [#jetbrains](https://daily.dev/tags/jetbrains), [#kotlin](https://daily.dev/tags/kotlin) [View this post on daily.dev](https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb) ```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":"Kotlin K2 Mode: Improving Performance and Integration in IntelliJ IDEA","url":"https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb"},"datePublished":"2025-04-15T15:03:53.463Z","dateModified":"2026-03-15T03:45:33.142Z","description":"IntelliJ IDEA 2025.1 introduces the K2 mode, a major enhancement for Kotlin support featuring a robust analysis engine and the new Kotlin Analysis API for...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6dbf8a1dccdb8259d8573843091732fd?_a=AQAEuj9","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6dbf8a1dccdb8259d8573843091732fd?_a=AQAEuj9","isAccessibleForFree":true,"articleSection":"Collections","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":"Collections","logo":"https://media.daily.dev/image/upload/s--fk_6ycEi--/f_auto,q_auto/v1780996001/logos/collections?_a=BAMAMiWQ0","url":"https://daily.dev/sources/collections"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/kotlin-k2-mode-improving-performance-and-integration-in-intellij-idea-i5qbzoaqb","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"devtools,jetbrains,kotlin","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collections","item":"https://daily.dev/sources/collections"},{"@type":"ListItem","position":3,"name":"Kotlin K2 Mode: Improving Performance and Integration in IntelliJ IDEA"}]} ```