JetBrains Newsletter

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From the World of AI | Product and Community News 

Introducing Mellum2 – the open-source LLM for ultra-low-latency inference. We’ve expanded far beyond the original Mellum while doubling down on performance and efficiency.

Mellum2 is JetBrains’ 12B-parameter open-source LLM built for real-world AI workflows, including routing, RAG pipelines, sub-agents, summarization, and other latency-sensitive tasks.

As Kotlin marks its fifteenth year, we’re celebrating with a special anniversary experience featuring a game, a special video, learning resources, and more.

The JetBrains AI coding agent is now generally available and ranks among the top coding agents on SWE-rebench. Junie plans before it codes, debugs, reviews PRs with full project context, and runs long tasks while you do something else. It's not just another terminal wrapper – it's wired into your IDE's tools, works in both the IDE and the CLI, and has no vendor lock-in. Bring any model and plan with a frontier one while implementing with a more cost-efficient one.

Best Python AI Frameworks in 2026

Not every AI project needs the same tool. This blog post covers when to use each AI framework, their strengths and limitations, and how to choose the right one for your project.

Find the right framework →  

Agentic AI Governance: Designing for Accountability and Control

Once an AI agent can take action on behalf of a business, the question is no longer whether it’s useful, but what happens when something goes wrong.

Learn more →  

Top Agentic Frameworks for Building Applications 2026

Building an AI agent? Don’t start by asking “Which framework is best?” Start with what you're building. This guide compares the top agentic AI frameworks to help you find the right fit for your project.

To the guide → 

Jeff Triplett on Django, FastAPI, and AI Agents

In this interview, the President of the Django Software Foundation shares some insights on Python web frameworks, modern tooling like uv and Pydantic, and how AI is completely reshaping dev workflows.

Get the full scoop →  

Bruce Eckel on Free-Threaded Python, Type Checking, and AI

In this interview, the author of the acclaimed Thinking in... book series discusses type systems, free-threading, and where programming languages might be heading next.

Hear from Bruce →  

Opinion: Anthropic Regulation or Trust Issues?

AI systems are increasingly trusted with consequential tasks – and increasingly regulated. The Anthropic dispute raises a broader question for AI teams: How do you verify, audit, and govern autonomous systems as their impact grows?

Get up to speed →  

Your JetBrains IDE Expertise, Now on LinkedIn

Every developer has tools they rely on every day – but that hands-on experience is hard to put into words on a professional profile. We've teamed up with LinkedIn to change that. You can now connect your JetBrains IDE to LinkedIn and showcase your real tool usage rather than relying solely on self-reported skills.

Supported IDEs include IntelliJ IDEA, PyCharm, WebStorm, GoLand, PhpStorm, Rider, CLion, RustRover, and RubyMine. DataGrip support is coming soon.

Show your IDE Expertise → 

YouTrack Helpdesk Now Includes Customer Groups

YouTrack Helpdesk now supports customer groups, helping B2B support teams tailor the experience to different customers. This YouTrack release also includes Whiteboards and Gantt chart improvements for project planning, more secure MCP connections for AI tools, new import options for ClickUp and Asana, and more.

Check it out →

New YouTrack Apps: Smart Sprint Planner, Test Manager, Linked Issues Timeline, and More

The latest apps created by YouTrack Certified Partners and independent developers help teams with sprint planning, testing and QA, time tracking, and everyday work with tasks and Knowledge Base articles.

Discover the apps →

Fitia: Scaling Latin America's Top Nutrition App With the JetBrains Startup Program

Find out how a team of 26 people backed by Y Combinator used DataGrip and GoLand to fix data fragmentation, double their Go microservice development speed, and support 10M+ users logging 30M food items every month.

Read the Fitia story →  

Static Code Analysis and the Rules of Zero, Three, and Five

C++ developer Anna Zhukova explores the Rules of Zero, Three, and Five (sometimes written as 0/3/5), which is a set of C++ guidelines about resource ownership and special member functions.