Kotlin Multiplatform releases
Latest Kotlin & Compose Multiplatform Versions (October 2026)
The latest stable Kotlin version is Kotlin 2.4.21, released Oct 8, 2026.
The latest stable Compose Multiplatform version is Compose Multiplatform 1.12.2, released Oct 15, 2026.
Kotlin
Latest stable
Kotlin 2.4.21
Released
Kotlin v2.4.21 is a patch release focused on stability, fixing bugs across Wasm, JVM reflection, JavaScript, serialization, Gradle Native, and scripting.
Read the release summary →Latest preview
Kotlin 2.5.0-Beta1
Published
For testing only. Ship production apps on the stable release.
Read the release summary →Recent Kotlin releases
| Version | Released | Notes |
|---|---|---|
| Kotlin 2.4.21 Latest | Summary | |
| Kotlin 2.4.20 | Summary | |
| Kotlin 2.4.10 | Summary | |
| Kotlin 2.4.0 | Summary | |
| Kotlin 2.3.21 | Summary | |
| Kotlin 2.3.20 | Summary | |
| Kotlin 2.3.10 | Summary | |
| Kotlin 2.3.0 | Summary | |
| Kotlin 2.2.21 | Summary | |
| Kotlin 2.2.20 | Summary |
Check your Kotlin version
Read the Kotlin plugin version in build.gradle.kts or gradle/libs.versions.toml. For the command-line compiler:
kotlinc -versionUpgrade to Kotlin 2.4.21
Set the Kotlin plugin version in build.gradle.kts, then sync Gradle.
kotlin("multiplatform") version "2.4.21"Compose Multiplatform
Latest stable
Compose Multiplatform 1.12.2
Released
Compose Multiplatform 1.12.2 is a targeted bugfix release addressing a graphicsLayer shadow animation flicker across platforms, an iOS crash tied to TextField…
Read the release summary →Latest preview
Compose Multiplatform 1.13.0-alpha02
Published
For testing only. Ship production apps on the stable release.
Read the release summary →Recent Compose Multiplatform releases
| Version | Released | Notes |
|---|---|---|
| Compose Multiplatform 1.12.2 Latest | Summary | |
| Compose Multiplatform 1.12.1 | Summary | |
| Compose Multiplatform 1.12.0 | Summary | |
| Compose Multiplatform 1.11.1 | Summary | |
| Compose Multiplatform 1.11.0 | Summary | |
| Compose Multiplatform 1.10.3 | Summary | |
| Compose Multiplatform 1.10.2 | Summary | |
| Compose Multiplatform 1.10.1 | Summary | |
| Compose Multiplatform 1.10.0 | Summary | |
| Compose Multiplatform 1.9.3 | Summary |
Full Compose Multiplatform version history →
Check your Compose Multiplatform version
Read the org.jetbrains.compose plugin version in build.gradle.kts or gradle/libs.versions.toml.
Upgrade to Compose Multiplatform 1.12.2
Set the plugin version in build.gradle.kts, then sync Gradle. Check the release notes for the Kotlin version it needs.
id("org.jetbrains.compose") version "1.12.2"Kotlin & Compose Multiplatform version FAQ
What is the latest stable Kotlin version?
The latest stable Kotlin version is Kotlin 2.4.21, released Oct 8, 2026.
Is there a Kotlin beta or release candidate?
The newest preview is Kotlin 2.5.0-Beta1, from Sep 23, 2026. Previews are for testing, not production.
How do I check my Kotlin version?
Read the Kotlin plugin version in build.gradle.kts or gradle/libs.versions.toml. For the command-line compiler: Command: kotlinc -version
What is the latest stable Compose Multiplatform version?
The latest stable Compose Multiplatform version is Compose Multiplatform 1.12.2, released Oct 15, 2026.
Is there a Compose Multiplatform beta or release candidate?
The newest preview is Compose Multiplatform 1.13.0-alpha02, from Oct 6, 2026. Previews are for testing, not production.
How do I check my Compose Multiplatform version?
Read the org.jetbrains.compose plugin version in build.gradle.kts or gradle/libs.versions.toml.