Junie

Junie is JetBrains’ AI coding agent, built into the IntelliJ platform and available as a standalone CLI, designed to complete real development tasks autonomously while keeping the developer firmly in control — and to do it cost-efficiently.

Overview

Junie plans before it codes. Its advanced plan mode writes structured requirements, design notes, and delivery stages into editable plan files you can approve or redirect, and it can plan on a powerful model while implementing on a faster, cheaper one. It supports more than ten frontier models via bring-your-own-key, remembers your team’s coding standards through persistent guidelines and reusable Agent Skills, and lets you steer it mid-task with live prompting — a capability JetBrains highlights as unique. Junie Lite provides a free AI layer in every JetBrains account, and the same agent runs both in JetBrains IDEs and as the Junie CLI in your terminal, where it has posted top results on the SWE-Rebench benchmark.

Key Features

• Autonomous coding agent for JetBrains IDEs and the terminal (Junie CLI)
• Advanced plan mode with editable, committable plans before any code changes
• Model freedom: plan and implement on different models, BYOK supported
• Live prompting — steer or redirect the agent in the middle of a task
• Persistent custom guidelines and Agent Skills shared across sessions
• Human-in-the-loop approvals with a dynamic allowlist for actions

💳 Pricing

Junie Lite is free to start: a free model is always on in every JetBrains account, and BYOK usage is billed at provider rates with zero markup. Full Junie usage comes with JetBrains AI subscriptions — AI Pro at $8.33 per user/month billed annually (10 AI credits per 30 days) and AI Ultimate at $25 per user/month (35 credits), with top-ups available anytime.

Who Is It For

Junie is for the millions of developers already working in IntelliJ IDEA, PyCharm, WebStorm, and other JetBrains IDEs, and for teams that want a controllable, model-flexible coding agent with predictable costs.