Junie

Junie is the AI coding agent by JetBrains, built to work with any model you choose and to keep you in control while it works. It runs as Junie CLI, an interactive terminal interface for Mac, Linux, and Windows, inside JetBrains IDEs powered by the IntelliJ IDEA engine, and as Junie Local, the full agent running entirely on your own machine. JetBrains positions it as the most cost efficient coding agent, and the mechanism is model choice: more than 10 models are supported through bring your own key, so you can plan a task on a powerful model and implement it on a fast one, at provider rates with zero markup, and locally running models are supported as well. Its homepage calls it a top performer on SWE-Rebench, printed here as the vendor's own benchmark claim. Control is the second theme. Advanced Plan Mode writes structured plan requirements, design, and delivery stages before touching code, and the plans live in a plans folder as editable, committable files you can approve or redirect. Live Prompting lets you steer the agent mid task and change direction without starting over, and its human in the loop design has you review, approve, and steer key actions, with a dynamic allowlist and user confirmation before execution. You can make Junie yours with custom guidelines and skills: teach it your team coding standards, naming conventions, and review rules, and it remembers them across sessions, with commands shared across the CLI and the IDE. Junie Lite is a free AI layer in every JetBrains account, with no trial and no card, and paid use runs through the JetBrains AI subscription tiers, which bundle AI credits per 30 days with anytime top ups, or through your own provider keys. JetBrains also notes hassle free migration from other AI coding agents, and that its tools adhere to SOC 2 certification. Pick Junie when you want a coding agent that plans before it edits, lets you steer and approve as it goes, remembers your team rules between sessions, and runs on the models and machines you already use every day.