Junie
JetBrains' AI coding agent — #1 on SWE-Rebench, plans before it codes
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About Junie
Junie is JetBrains' native AI coding agent, purpose-built for developers who live in JetBrains IDEs (IntelliJ IDEA, PyCharm, GoLand, WebStorm, Rider, and more). Launched in January 2025 as a beta plugin and reaching general availability in June 2026, Junie achieved the #1 ranking on SWE-Rebench (an independent agent benchmark with fresh tasks each cycle) with 61.6% of tasks resolved and 72.7% pass@5 — placing it ahead of all other agent-harness combinations and competitive with raw frontier models. Unlike JetBrains AI Assistant (which focuses on IDE completions and chat), Junie is a fully agentic system that plans before it codes.
Junie's signature behavior is structured planning: before touching any code, it writes a plan with requirements, design, and delivery stages for human approval. You can approve, redirect, or steer mid-task — the agent incorporates feedback without requiring a restart. It supports deep IDE integration including the ability to run tests, start local servers, use debuggers, and apply debugging patterns autonomously (e.g., "Debug and figure out why this test fails only on the second iteration"). In March 2026, JetBrains launched Junie CLI (Beta) — a fully standalone, LLM-agnostic coding agent for any IDE, terminal, CI/CD pipeline, GitHub issues, GitLab MRs, with one-click migration from Claude Code, Codex, and others. Junie CLI supports BYOK at provider-rate pricing with zero markup.
Junie is powered by third-party LLMs including models from Anthropic (Claude), OpenAI (GPT, o-series), and Google (Gemini), selectable per task. Pricing uses JetBrains' AI credit system (1 credit ≈ $1 USD), shared with JetBrains AI Assistant. The AI Pro plan ($100/year) includes a basic credit quota with BYOK option; the AI Ultimate plan ($200/year) provides a larger credit quota for heavy agentic workflows. Enterprise users can get Junie on the AI Enterprise plan with advanced user management and higher quotas.
Key Features
- #1 on SWE-Rebench (June 2026) with 61.6% resolved and 72.7% pass@5 — top-ranked coding agent on an independent benchmark with fresh tasks
- Structured planning before coding — writes requirements, design, and delivery stages for human approval before touching any file
- Human-in-the-loop steering — approve, redirect, or steer the agent mid-task without restarting from scratch
- Deep JetBrains IDE integration — runs tests, starts local servers, uses the debugger, and applies autonomous debugging patterns natively
- Junie CLI (Beta) — standalone LLM-agnostic agent for any IDE, terminal, CI/CD, GitHub issues, and GitLab MRs with one-click migration from Claude Code and Codex
- LLM-agnostic BYOK — Claude (Anthropic), GPT and o-series (OpenAI), Gemini (Google), Grok — at provider-rate pricing with zero JetBrains markup
- Custom guidelines and team conventions — teach Junie your coding standards, naming conventions, and review rules; it remembers them across sessions
- Plan on powerful models, implement on fast ones — use frontier reasoning models for planning and smaller fast models for implementation to cut costs without losing quality
Pros
- #1 on SWE-Rebench at 61.6% resolved — independently validated as the top-performing coding agent harness with fresh benchmark tasks
- Structured plan-first approach prevents unintended changes — you review and approve the plan before the agent writes a single line
- Native JetBrains integration — not a ported VS Code extension; Junie uses the full JetBrains SDK for tests, debuggers, local servers, and project-aware refactoring
- Junie CLI (March 2026) extends the same agent to any IDE, terminal, CI/CD, GitHub, and GitLab with BYOK at zero markup
- Model flexibility with cost optimization — plan on powerful models, implement on fast/cheap models, saving significant credit costs on complex tasks
- From JetBrains — the company with 15M+ developer users and 30 years of IDE expertise; strongest enterprise trust signal in the JetBrains ecosystem
Cons
- Credit-based pricing is complex and can be expensive for heavy agentic workflows — agentic tasks consume many internal model calls, draining credits faster than expected
- Requires an active JetBrains IDE subscription to access the full Junie plugin (though Junie CLI is standalone)
- Credits shared between Junie and AI Assistant — heavy AI Assistant users may exhaust quotas before using Junie
- Junie CLI is still in Beta as of mid-2026 — some features like ACP mode and advanced IDE integration are still being refined
- No permanently free tier for commercial use beyond the 5-credit trial — BYOK is the best option for cost-sensitive developers
- Credit pricing is per-token and varies by model, making monthly costs hard to predict for variable workloads
Pricing
Junie uses JetBrains' AI credit system where 1 AI Credit ≈ $1 USD. Credits are shared between JetBrains AI Assistant and Junie. Since August 2025, credits reflect actual per-token costs at provider rates.
The AI Pro plan costs approximately $100/year and includes a basic monthly credit quota suitable for occasional Junie use plus full JetBrains AI Assistant access. The AI Ultimate plan at approximately $200/year includes a larger credit quota recommended for regular Junie agentic workflows. Both plans can be topped up with additional credits at any time, which remain valid for 12 months.
Junie also supports BYOK (Bring Your Own Key) at provider-rate pricing with zero JetBrains markup — providing full model access at the lowest possible cost for developers who want to control their LLM spend. The Junie CLI free access includes 5 AI credits for a real first task. JetBrains AI Enterprise adds Junie with a large quota, advanced user management, and SSO for organizations.
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Frequently Asked Questions
Junie is JetBrains' AI coding agent with a structured plan-before-code approach, deep IDE integration for running tests and debuggers, and multi-surface support (IDE plugin, CLI, GitHub, GitLab). JetBrains AI Assistant is the IDE's AI coding assistant focused on completions, inline editing, and chat. Both share the same credit system but are separate products — Junie is agentic and autonomous, AI Assistant is reactive and assistant-mode.
On the latest run of SWE-Rebench (an independent benchmark that draws fresh tasks each cycle to prevent overfitting), Junie placed #1 with 61.6% resolved and 72.7% pass@5. This placed it ahead of all other agent-harness combinations and competitive with raw frontier models on the benchmark.
Junie CLI (launched March 2026, Beta) is a standalone, LLM-agnostic coding agent that runs in any terminal, IDE, CI/CD pipeline, GitHub issues, and GitLab MRs. It supports BYOK at provider-rate pricing with zero JetBrains markup and offers one-click migration from Claude Code, Codex, and other agents. It is separate from the JetBrains IDE plugin and works without a JetBrains IDE subscription.
Junie uses JetBrains' AI credit system where 1 credit ≈ $1 USD. AI Pro ($100/year) includes a basic monthly credit quota; AI Ultimate ($200/year) includes a larger quota for frequent agentic use. Both can be topped up anytime. BYOK is available at provider rates with zero markup. Junie CLI includes 5 free credits for a first real task.
Junie is powered by LLMs from Anthropic (Claude), OpenAI (GPT, o-series), Google (Gemini), and Grok, selectable per task. You can also use BYOK with your own API keys at provider-rate pricing with no JetBrains markup. Local model support via Ollama was on the roadmap but not yet available as of mid-2026.
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