Jetbrains

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

Today, we’re releasing Mellum2.1, the next version of the 12B mixture-of-experts model we

This post was adapted from Kai Schmithuesen’s talk at JetBrains Game Development Day 2026. See the full video presentation and Q&A below, or keep reading!

Table of Contents

CI/CD remains one of the foundations of modern software development. According to the JetBrains Developer Ecosystem Survey 2026, 83.4% of respondents who use DevOps practices run CI/CD pipelines.

The new report looks at how teams are running those pipelines, which tools they use, and where AI fits into their workflows. It brings together findings from four JetBr...

Waiting on “waiting for a starting agent” is a special kind of annoying when you just want your PR tests to run. It stings most when a quick one-minute build sits in the queue for ten minutes while that one slow Windows cloud instance spins up.

The Warm Agents plugin is our answer to this delay.

With this plugin, TeamCity maintains a target count of idle, ...

What engineering teams tell us about working with AI agents. Part 1 in the series.

Over the past few months, I’ve spent a lot of time on discovery calls with engineering organizations, from a 16-developer software agency to telcos, game studios, and consultancies with thousands of developers. Almost none of them are asking whether to use AI agents. At one f...