JetBrains open sources KotlinLLM runtime code generator

JetBrains open-sourced KotlinLLM, an IntelliJ IDEA plugin prototype that delegates runtime logic to a large language model (LLM) from Kotlin code, enabling code generation, runtime updates, and hot-reloading. The project, released July 28 under Apache License 2.0, addresses limitations of existing options for using LLMs at application runtime.

KotlinLLM, a research prototype for delegating runtime logic to a large language model https://www.infoworld.com/article/2335213/large-language-models-the-foundations-of-generative-ai.html LLM from Kotlin https://www.infoworld.com/article/2256390/what-is-kotlin-the-java-alternative-explained.html code, is now going open source and public, JetBrains announced. Revealed July 28 https://blog.jetbrains.com/research/2026/07/kotlinllm-open-source/ , KotlinLLM https://github.com/JetBrains-Research/kotlinllm-plugin is an IntelliJ IDEA plugin prototype for experimenting with LLM-driven “Smart macros” in Kotlin, enabling code generation, runtime updates, and hot-reloading. In software engineering, LLMs are commonly used during development for code completion, code generation, and program comprehension, JetBrains noted, but using an LLM at run time of a compiled application is much less common. The existing options for doing this have the following trade-offs, according to JetBrains: KotlinLLM addresses these limitations in three ways, JetBrains said: KotlinLLM is open source under Apache License 2.0. The repository contains the KotlinLLM IntelliJ IDEA plugin, the Smart macro API, and example projects.