Latest news
January 13, 2026
Compose Multiplatform 1.10.0: Unified @Preview, Navigation 3, and Stable Compose Hot Reload
Compose Multiplatform 1.10.0 has been released! We’re continually developing our multiplatform APIs and expanding support for Jetpack libraries commonly used on Android. Here are the highlights of this release: Get Started with Compose Multiplatform For a complete overview of the changes, check out What’s new in Compose Multiplatform 1.10.0 or the release notes on GitHub. […]
January 13, 2026
The Journey to Compose Hot Reload 1.0.0
Compose Hot Reload has just been promoted to stable with our 1.0.0 release. We worked hard to build a technology that is easy to use and well-integrated into existing tools while also requiring zero configuration from users. The tool is bundled with Compose Multiplatform, starting from version 1.10 (see our dedicated release blog post). While […]
January 13, 2026
Building AI Agents in Kotlin – Part 4: Delegation and Sub-Agents
Previously in this series: In the previous installment, we saw how to set up tracing, which brings us to two new questions: What should we experiment with based on the information this tool provides? And what parts of our agent could we improve using its observations? The first idea we had was to experiment with […]
January 12, 2026
Advent of Code 2025 in Kotlin: Puzzles, Prizes, and Community
Thank you to everyone who participated in Advent of Code 2025 in Kotlin! Once again, it was a joy to see so many of you sharing solutions, cheering each other on in Slack, and keeping the holiday coding spirit alive. This year, we kicked things off with five days of livestreams on December 1–5, with […]
fun main() {
val name = "stranger" // Declare your first variable
println("Hi, $name!") // ...and use it!
print("Current count:")
for (i in 0..10) { // Loop over a range from 0 to 10
print(" $i")
}
}Kotlin in action
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Kotlin + AI
JetBrains is investing in AI models tailored for Kotlin, providing open data, benchmarks, and AI-native tooling integrated into your workflow.
At the same time, Kotlin makes it easy to build your own AI-powered features with seamless backend integrations and a growing ecosystem.
What you get with Kotlin + AI
- Strong support across JetBrains AI tools like AI Assistant and Junie
- Robust functionality for building AI-powered apps on the JVM
- Native integration with tools like Spring AI and LangChain4j
- Open data and benchmarks for better code generation
Build your own AI agents with Koog
Koog is JetBrains’ new Kotlin-native framework for creating powerful AI agents that run locally, interact with tools, and automate complex tasks. Whether you’re developing a simple chat assistant or an advanced multi-step workflow, Koog gives you full control with clean Kotlin code – no external services are required. Build, extend, and experiment with AI agents entirely in Kotlin.
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