JetBrains AI Assistant

What is JetBrains AI Assistant?

JetBrains AI Assistant is a deeply integrated AI assistant available in all JetBrains development environments, including IntelliJ IDEA, PyCharm, WebStorm, GoLand, Rider and PhpStorm. Unlike standalone tools, the assistant understands not only the lines of code you are writing at that moment, but the entire project structure: class hierarchies, dependencies, test files and documentation. As a result, suggestions fit seamlessly with your codebase and conventions.

How does JetBrains AI Assistant work?

The assistant uses a combination of large language models, including models from JetBrains itself and integrated support for external providers. These models are connected to the deep IDE integration that JetBrains has been building for decades.

Crucial is access to the project's full PSI tree (Program Structure Interface). This means the AI understands code at a semantic level and not just at a textual level. Suggestions are therefore syntactically correct and automatically take into account types, imports and project-specific conventions, without you having to manually copy context to an external chat window.

Key features

• Generate code — produce complete methods based on a natural-language description.
• Write unit tests — automatically generate tests for existing functions.
• Explain legacy code — get complex or unfamiliar pieces of code clearly explained.
• Project-wide refactoring — restructure code while taking the entire project and its coherence into account.
• Context-aware suggestions — the IDE supplies the context automatically, without external connections.

Difference from other tools

Where GitHub Copilot mainly works at the file level and tools like ChatGPT require context you supply yourself, JetBrains AI Assistant operates at the project level with context the IDE itself generates. Code reviews, refactoring sessions and bug fixing are therefore faster, because the assistant understands exactly how components relate to each other.

Who is it for?

The tool is primarily aimed at professional software developers who work daily in a JetBrains environment and want to strengthen their existing workflow without switching IDEs. For teams already working with JetBrains tooling, this is the most coherent choice: no extra extensions, API connections or external services are needed beyond the familiar JetBrains ecosystem.