TL;DR KotlinLLM is now public. It’s a research prototype for delegating runtime logic to an LLM from Kotlin code. Instead of calling an LLM on every request or running a separate agent, you can write an explicit Kotlin call. Its body is generated Kotlin source code, and that code is updated as your application hits […]
Kotlin
https://blog.jetbrains.com/kotlin/ · 21 posts · history since 2026 · active
Today
17 Jul
🎉 Kotlin turns 15! 🎉 For 15 years, you’ve helped shape Kotlin into the language it is today. Whether you’ve built apps, contributed to the ecosystem, taught others, or simply chosen Kotlin for your next project – thank you for being part of the journey. Today, we’re celebrating Kotlin and the people who have made […]
9 Jul
A few years back, the Kotlin team figured it was time their programming language had a mascot – something fun and friendly to make developers feel more at home. After all, so many other programming languages have their own characters – Gofer, elePHPant, Dart’s Dash, or Rust’s Ferris, for example. Bringing Kodee to life wasn’t […]
8 Jul
Agentic coding benchmarks are getting closer to real-world software development. For Kotlin teams, the most important question is how reliably AI agents can complete end-to-end Kotlin tasks, from reading an issue to producing a solution that passes validation. We’re taking the first step in addressing that gap by releasing the Kotlin Benchmark, JetBrains’ official benchmark […]
3 Jul
KotlinConf 2026 marked a milestone for the Kotlin community: the very first Golden Kodee Community Awards. The awards recognize the individuals and communities whose passion and dedication help the Kotlin ecosystem thrive. From creating educational content and building engaging online communities to organizing events, fostering connections, and driving positive societal impact, the Golden Kodee Awards […]
1 Jul
Kotlin support is now available in BlueJ, one of the most established environments for teaching introductory object-oriented programming (OOP). This work is the result of a collaboration between JetBrains and the BlueJ team at King’s College London, including Professor Michael Kölling and Dr. Neil Brown, whose work has shaped programming education for decades. Download BlueJ […]
30 Jun
Hi everyone! May and June brought so much Kotlin news that I needed a little extra space for this roundup. Kotlin turned 15, Kotlin 2.4.0 arrived with new capabilities for developers on every platform, and I found plenty of ways to learn, experiment, build AI agents and AI-powered applications, and explore useful Kotlin Multiplatform libraries. […]
29 Jun
Starting from IntelliJ IDEA 2026.2, JetBrains will sunset Kotlin Notebook as a product and will no longer maintain it. The plugin will remain available on an open-source model so the community can continue its development. Below, we explain why we’re making this change, how it affects current Kotlin Notebook users, what comes next, and how […]
24 Jun
Amper 0.11.0 is out, and you will notice a shift in the product branding immediately. If you missed the KotlinConf keynote (watch the recording), here’s the headline: Amper has evolved into the Kotlin Toolchain and is now Alpha! This release brings that transition to life, alongside the ability to publish JVM libraries, new plugin development […]
3 Jun
The Kotlin 2.4.0 release is out! Here are the main highlights: For the complete list of changes, refer to What’s new in Kotlin 2.4.0 or the release notes on GitHub. How to install Kotlin 2.4.0 The latest version of Kotlin is included in the latest versions of IntelliJ IDEA and Android Studio. To update to […]
27 May
Last week at the KotlinConf 2026 keynote (watch the recording here), we announced Koog 1.0. Koog is JetBrains’ open-source framework for building AI agents in Kotlin and Java. It provides the core building blocks for agentic applications: tools, workflows, persistence, memory, observability, and integrations with existing JVM and Kotlin Multiplatform projects. We introduced Koog at […]
21 May
Kotlin turns 15 this year, and it really is everywhere. It powers systems behind everyday moments, such as tapping to pay, buying commuter rail tickets, using in-flight entertainment, and even filing tax returns online. As AI continues to reshape how software gets built, Kotlin’s growing real-world impact reflects the importance of languages and tools that […]
Upgrade rhythms vary significantly among Kotlin’s user base. Some teams update whenever a new release lands without a second thought. On the other hand, a team inside a regulated organization moves on a multi-quarter cycle and treats every dependency as something that has to be reviewed, approved, and then frozen in production for a while. […]
Today at KotlinConf 2026, we announced the Alpha release of the official Kotlin extension for Visual Studio Code. IntelliJ IDEA and Android Studio remain the most complete environments for Kotlin development. But not every Kotlin developer uses either IDE – some prefer VS Code. Kotlin by JetBrains is an extension for those developers, providing official […]
20 May
Years of productivity-focused design are now visible in the data. Pragmatism has been central to Kotlin’s design from day one. The language prioritizes the developer’s convenience and productivity over academic purity or feature ambition. Developers describe working in Kotlin in a fairly consistent way: more time spent on what you’re trying to build, less time […]
15 May
We are updating the default project structure for Kotlin Multiplatform projects to give modules clearer responsibilities, better align with conventions used by other build systems and frameworks, and reflect the changes in Android Gradle Plugin 9.0. You’ll see this project structure in newly created projects generated by our tools, in the official documentation, and in […]
AI is rapidly changing the way developers write, review, learn, and maintain code. Code completion, AI chat assistants, autonomous coding agents, and other tools are giving rise to new workflows almost every month. But one important question remains: How well do these tools actually work with Kotlin? We want to better understand how Kotlin developers […]
A new release of Compose Multiplatform has landed, with improvements to the iOS and web experience and a refreshed approach to UI testing. Read on for the highlights, or for the complete list of changes, check out the What’s New. Get Started with Compose Multiplatform Native text input on iOS If you’ve wanted text fields […]
13 May
TL;DR New “val inside parentheses” syntax is being introduced to allow for name-based destructuring. Additionally, new syntax with square brackets is being introduced for positional destructuring. Both are currently Experimental (enabled using the -Xname-based-destructuring=only-syntax compiler argument) and will become Stable in a future release. In the distant future, the behavior of the “val outside parentheses” […]
7 May
In the Kotlin Ecosystem Mentorship Program pilot, mentors and mentees worked together on real Kotlin open-source projects to make their first meaningful community contribution. Four pairs successfully completed the two-month program, and one eligible pair was randomly selected in the prize drawing to receive the grand prize – a trip to KotlinConf 2026 in Munich! […]
4 May
Hi everyone! April brought exciting community news with the announcement of the Golden Kodee finalists, along with Kotlin and tooling releases, multiplatform progress, and fresh backend resources. I also came across the new Kotlin Professional Certificate on LinkedIn Learning, which is a great way to build your skills. And if you want something more playful, […]