The JetBrains Blog

The latest updates on all JetBrains products and topics

AI

The night before AGNTCon + MCPCon Europe, we hosted the Agentic AI Foundation community at the JetBrains office in Amsterdam. The event filled up fast and went to a waitlist, which is not what I expected for a Wednesday evening discussion about how open foundations work. Ibrahim Malik opening…

Trained with reinforcement learning in real environments, Mellum2.1 is built for coding agents and fast sub-agents that run on your own hardware.

September gave us plenty to talk about, with major releases and thought-provoking reads. Java 27 arrived, and JetBrains opened a new chapter in agentic development with the announcement of JetBrains Air, a system of products for agentic software development, followed by the EAP of JetBrains Air in I…

The State of Kotlin in 2026 report combines data from JetBrains research with independent industry data and real-world adoption evidence.

Rider 2026.2.3 brings AI performance analysis to the Monitoring tool window and fixes an issue with the AI Agent Setup widget on Windows. You can update directly from the IDE, through the Toolbox App, or by downloading the latest version from our website. AI performance insights from the Monito…

“100% of my code is written by AI coding agent!” You’ve probably heard this claim many times this year.

AI can write code quickly, but Django developers still need to understand the application, evaluate what the agent produces, and be accountable for what ships. That makes your IDE more important, not less.

We traced a frontier model through fifteen C# refactoring tasks and counted what it reached for. It piped text into interactive commands 468 times. It called git 422 times and sed 392 times. It ran dotnet build 163 times. Across 2,513 tool calls it performed a structural refactoring operation exactl…

How many developers use AI coding agents (Claude Code, Codex, Cursor, JetBrains Junie, and others)? Evidence from the Developer Ecosystem Survey 2026.