JetBrains AI
by JetBrains
AI Assistant and the Junie coding agent inside JetBrains IDEs
Last reviewed 2026-06-19
JetBrains AI is the umbrella for JetBrains' AI tooling embedded inside its IDEs, split into two products with different autonomy. AI Assistant is the inline copilot and chat layer: AI code completion, next edit suggestions, in-IDE chat, code generation and explanation, commit-message and doc generation, and refactoring help. It is reactive and developer-driven, with a human in the loop on every action. Junie is JetBrains' autonomous coding agent, which plans and executes multi-step actions, makes edits across a project, runs tests and terminal commands, uses IDE inspections and the real debugger, and calls external tools. The autonomy distinction matters: AI Assistant is copilot, while Junie is supervised by default and can run more autonomously in a mode that acts without per-step confirmation. Both run as plugins inside JetBrains IDEs against a cloud LLM backend, with local-model and bring-your-own-key options. JetBrains is privately held, headquartered in Prague, and ships its own Mellum model for free code completion alongside third-party LLMs.
What it can do
Complete code inline and suggest next edits
CopilotAI code completion and next edit suggestions, with free unlimited completion via JetBrains' Mellum model.
sourceGenerate and explain code via chat
AssistantIn-IDE chat that generates and explains code and writes commit messages and docs.
sourcePlan and execute multi-step tasks (Junie)
SupervisedJunie plans and executes multi-step actions, editing across files, running tests and terminal commands, and using the IDE debugger; a more autonomous mode acts without per-step confirmation.
sourceConnect external tools via MCP
SupervisedConnects to MCP servers for databases, file systems, and APIs.
source
Strengths
- +Deep native IDE integration with full project context, inspections, and the real debugger
- +Model flexibility plus genuinely free unlimited completion via the Mellum model
- +Strong agent (Junie) with safeguards: approval workflows, plan mode, MCP, and CI/CD
Limitations
- −Credit-based pricing can be opaque or limiting for power users
- −Locked to the JetBrains IDE ecosystem
- −Headline benchmarks are vendor self-reported and the newest agent features are very recent
Overview
JetBrains AI brings AI into JetBrains IDEs via two products: AI Assistant (inline copilot and chat) and Junie (an autonomous coding agent).
What it does
AI Assistant completes code and suggests next edits (copilot) and generates and explains code in chat (assistant). Junie plans and executes multi-step tasks, edits across files, runs tests and the debugger (supervised by default, more autonomous in its act-without-confirmation mode), and connects to MCP tools.
Integrations & setup
Runs as plugins across all JetBrains IDEs against a cloud LLM backend, with local-model and BYOK options, MCP support, and CI/CD integration via GitHub Actions and GitLab.
Pricing
Freemium and credit-based: a free tier (with free Mellum completion), AI Pro at $10/mo, AI Ultimate at $30/mo, plus business and enterprise tiers.
Best for / not for
Best for developers already in the JetBrains ecosystem who want deep IDE-native AI and an agent with strong project context. Not a fit for teams outside JetBrains IDEs.
Alternatives
GitHub Copilot and Cursor are the leading coding assistants; Windsurf is an agentic IDE; Tabnine is an alternative completion engine.
What people are saying
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FAQ
What is the difference between JetBrains AI Assistant and Junie?+
AI Assistant is the inline copilot and chat layer where the developer acts on every suggestion. Junie is the autonomous coding agent that plans and executes multi-step tasks across the project, supervised by default with an option to act without per-step confirmation.
Does JetBrains AI support multiple models?+
Yes. It offers OpenAI, Anthropic, and Google models plus JetBrains' own Mellum for free code completion, and supports local models and bring-your-own-key.
Sources
- JetBrains AI licensing and subscriptions · accessed 2026-06-19
- Junie by JetBrains (AI Assistant docs) · accessed 2026-06-19
- Introducing JetBrains AI and the in-IDE AI Assistant · accessed 2026-06-19
Last reviewed 2026-06-19