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It's December, which means the 2025.3 release season is here! All our IDEs have received updates, and in this thread, we'll share some of the highlights. As usual, the new features are also available in plugins that you can install into IntelliJ IDEA or other JetBrains IDEs.

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JetBrains

@jetbrains

Dec 12

AI won’t replace developers – it will evolve their craft

@SwamiSivasubram

(AWS) shares why the future of coding is about more possibilities, not fewer engineers.

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Apparently, even Christmas jumpers have their own holiday! It's hard to keep track of all these themed days, but our colleagues do – and they’ve prepared something special to celebrate. Get one for a friend, or treat yourself:

jetbrainsmerchandise.com

Holiday Shift Sweater

The world of AI doesn't seem to be slowing down as we reach the end of the year.

@OpenAI

GPT 5.2 has just been released, offering less verbose responses and more reliable instruction following. And it’s already available – both in Junie and in the AI chat inside your JetBrains

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Congrats to the

team on releasing Mistral Vibe! Since it already supports the Agent Client Protocol (ACP), you can add it to the AI chat in your JetBrains IDE e̵a̵s̵i̵l̵y̵ through a JSON configuration file and try it out right away.

Is DevOps still working? Kelsey Hightower breaks down the evolution toward platform engineering, AI-assisted ops, and life beyond Kubernetes. Watch the full interview

jb.gg/j0fcse

0:02 / 0:25

0:22

Reminder: This is happening tomorrow! Discover how Mellum and

@NVIDIA

come together to drive smarter coding inside JetBrains IDEs.

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JetBrains

@jetbrains

Dec 5

Join our webinar with @NVIDIA on Dec 11 at 10 am CET to explore Mellum, the coding LLM integrated into JetBrains IDEs. Find out how we used NVIDIA AI infrastructure to train and serve Mellum, and how to use the open-source version of it in your projects: jb.gg/s4ho0s

Coding on a phone with an AI agent? That’s so last quarter! Our colleague

@hszanowski

took things to the next level: He ran

@IntelliJIDEA

and Junie on his gaming handheld and wrote a game in Kotlin using ONLY a controller:

Ever wondered who keeps Java’s bytecode ecosystem running? Marco talks with ByteBuddy creator Rafael Winterhalter about JVM internals, Mockito, and Hibernate under the hood, legacy Java realities, and the human side of open-source sustainability. Watch the full episode on the

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Our Ask Me Anything week on Reddit is going strong! Don’t miss the Kotlin AMA on Thursday and the JetBrains AI AMA on Friday – and catch up on answers from earlier AMAs.

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JetBrains

@jetbrains

Nov 28

If you’ve ever wanted direct access to JetBrains experts… congratulations — December is your month. We’re hosting a multi-language AMA series on Reddit. Stay tuned to join the conversation! Links to the subreddits below:

r/jetbrains: bit.ly/4p5RkaQ

r/kotlin:

Moneyball meets esports! We’re teaming up with

@cloud9

for a hackathon where you can analyze real game data, build an AI coach, or design a fan‑friendly minigame – and win cool prizes. With Cloud9, the sky is the limit.

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Cloud9

@Cloud9

Dec 10

Join us for the Sky's The Limit - Cloud9 x @JetBrains Hackathon with esports data powered by @GRIDesports!

You could win any of these prizes when you participate:

All-expense paid trip to the GDC Festival of Gaming 🧑‍💻

JetBrains All Products Pack (1 Year License)

$25k

JetBrains is joining the new Agentic AI Foundation, hosted by

@linuxfoundation

, to contribute to the next generation of open, transparent, and interoperable agentic technologies. AAIF will take stewardship of projects including MCP, goose, and AGENTS.md.

It's December, which means the 2025.3 release season is here! All our IDEs have received updates, and in this thread, we'll share some of the highlights. As usual, the new features are also available in plugins that you can install into IntelliJ IDEA or other JetBrains IDEs.

The performance of

’s debugger has been improved, and it allows you to evaluate a much wider range of Rust expressions during debugging. This release also significantly improves the quality of error highlighting and code insight features.

Download the new releases from jetbrains.com, install them through the Toolbox App, or use in-product updates. Looking forward to your feedback!

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