JetBrains AI

Instantly deploy a trusted, transparent code completion model without additional fees.

This summer, we're making Mellum, our code completion model, easier for developers to use locally, and we’re introducing support for more languages than ever.

AI agents are already in your tools—now it’s time to understand them. Learn to build and work with them responsibly in this free course by JetBrains and Nebius.

I was testing my agent built on Koog, JetBrains' open-source framework for building AI agents in Kotlin. I fed it a task from SWE-bench-Verified, a real-world GitHub issue that tests whether AI can actually write code. For the first 100 messages, everything looked promising. The agent methodicall…

At AI Summit London 2025, Kris Kang, Head of Product for AI at JetBrains, gave a talk that questioned a common belief in AI development: that bigger means better.

AI is no longer a distant idea. It’s already here and changing how we build software. As it advances, new questions emerge about its impact. 

In May, 145 JetBrains employees from across teams and time zones paused their regular work to participate in a 48-hour AI hackathon. With support from Google Cloud, the participants built a total of 41 prototypes from scratch. Some were practical, others experimental, but all explored how AI could change how developers work.

JetBrains Mellum – our open, focused LLM specialized on code completion – is now available to run as a containerized microservice on NVIDIA AI Factories.

In AI-enabled IDEs, code completion quality heavily depends on how well the IDE understands the surrounding code – the context. That context is everything, and we want your help to find the best way to collect it.

AI hints in JetBrains Academy plugin now guide Python and Kotlin learners with smart code suggestions in the IDE. Learn faster, get unstuck, and stay focused.

It often feels like AI is ubiquitous these days. From helping with research to creating a joke, AI seems able to do everything for us. The public response and general opinions about AI are mixed. Some see the negative aspects of AI and frequently wonder, “Will AI take over my job?”, “Could AI steal …

Mellum doesn't pretend to know everything, but it does one thing exceptionally well. We call it a focal model – small, efficient, and built with a specialized focus.