JetBrains AI

JetBrains Air is now available for Windows. Try it today!

Here's a case worth pondering: your app freezes for ten seconds, and you ask an AI agent what's wrong. What does it actually do? For a long time the honest answer was: it rummages through your code and takes a wild guess. A snapshot taken by a profiler tool is runtime evidence. It knows exactly w…

At the JetBrains x Codex Hackathon, I spent two days watching teams build and then pitch their projects. The thing that decided most of the winners wasn't just the previous twenty-four hours of work. It was the few minutes they spent presenting it. A strong project with a confusing demo loses to a s…

Junie started as an experiment. We asked, “What if an AI coding agent didn't just guess at the details of your project, but actually used the same tools you do?” Over the last year, that experiment turned into a product used by developers every day – inside the IDE and the terminal.  Today, …

Many organizations are already deploying agentic workflows. Some are still experimental, while others are running in production. Enterprise customers are not only buying AI capability. They are buying trust and operational control. 

Trained from scratch and designed for practical deployment, Mellum2 is built for routing, Q&A, sub-agents, and private AI use in software engineering systems. Today, we’re open-sourcing Mellum2, a 12B model engineered to solve the hardest parts of production AI: latency, throughput, and cost.…

Indexing is one of the most important and hardest to optimize parts of an IDE. We applied AlphaEvolve to see whether it could uncover performance improvements in a mature, highly optimized codebase.

Koog 1.0 is out! JetBrains’ AI agent framework for Kotlin and Java now features a stable core with a 1-year API stability guarantee for production backends.

Postponed refactoring isn't a discipline problem — it's a risk calculation. Here's how four teams changed what went into that calculation.

We're excited to announce that the Early Access Program (EAP) for ReSharper and .NET Tools 2026.2 is now underway! While our EAP announcements usually cover a wide range of new features, performance updates, and bug fixes, this release is different. We are dedicating this first preview entirely t…

AI coding tools are raising PR volume and changing the defect profile. Your reviewers are the same people. Here's what the data says about the gap.

443 developers applied. 39 projects shipped. Here's a deepdive on the finalists and their projects presented at the JetBrains X Codex Hackathon in San Francisco.