Reviewed by Harsh Desai · Last reviewed:
JetBrains AI Assistant
Purpose-Built IDEs for Every Language and Stack with the top AI agents in the industry integrated seamlessly
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JetBrains AI Assistant is an IDE-native AI coding suite from JetBrains, the company behind IntelliJ IDEA, PyCharm, WebStorm, and 10+ other professional IDEs. Unlike VS Code plugins, the AI runs inside the same process that already understands your project's symbols, types, dependencies, and refactoring graph, so completions and chat answers reflect actual project structure rather than plain text guesses.
What JetBrains AI Assistant does:
- •Smart code completion the proprietary Mellum model predicts full lines and blocks based on project patterns, type signatures, and recent edits, with results that match the IDE's existing inspection graph.
- •Next Edit Suggestions the assistant anticipates the next change you would make based on cursor position and recent diffs, available without consuming credits for Java, Kotlin, and Scala.
- •AI chat with project context conversational interface that reads open files and the project tree to answer codebase questions, explain unfamiliar code, or scaffold features.
- •Junie autonomous agent multi-step coding agent for complex refactors and feature scaffolding, included in AI Pro and Ultimate tiers, with handoff to Claude Agent and other ACP-registered agents.
- •Unit test generation writes tests with framework-appropriate syntax (JUnit, pytest, Jest) that match your existing test suite's patterns and edge-case style.
- •VCS commit messages and PR summaries generates commit text from staged diffs and pull-request descriptions across Git, GitHub, GitLab, and Bitbucket.
- •Code conversion across languages translates Python to JavaScript, Java to Kotlin, and other common pairs while preserving idiomatic patterns and API conventions.
- •MCP support connects to any Model Context Protocol server for file access, database queries, or external tools alongside the AI chat.
- •Local AI and BYOK runs Ollama, LM Studio, or any OpenAI-compatible endpoint for offline use, plus Bring Your Own Key for OpenAI, Anthropic, Azure, AWS Bedrock, and Google Vertex AI on Pro+ tiers.
- •CLI and SSH workflows the JetBrains command-line tools and remote development features pair with the AI chat so you can drive the assistant from terminals and remote dev containers.
Pricing:
- •AI Free $0: 3 AI credits per 30 days, unlimited local model support (Ollama, LM Studio), requires IDE 2025.1 or higher.
- •AI Pro $10/month: 10 monthly credits, cloud models, Next Edit Suggestions, Junie agent, BYOK for OpenAI and Anthropic. Annual billing saves around 20%.
- •AI Ultimate $30/month: 35 monthly credits for heavy Junie and chat use, plus all Pro features at higher quota.
- •AI Enterprise $60/user/month: on-premise deployment, SSO/SCIM, audit logging, BYOK extended to Azure, AWS Bedrock, and Google Vertex AI. Top-up credits cost $1 each and stay valid for 12 months.
Limitations:
- •Three times the price of GitHub Copilot for comparable features AI Ultimate is $30/month versus Copilot Pro at $10/month, so anyone primarily using completion plus chat overpays unless they live inside JetBrains IDEs.
- •Credits burn unpredictably fast multiple developers report exhausting an entire month's quota in a single heavy session, with one user burning $10 of Claude Sonnet credits across just four small files in two hours.
- •Quota was quietly cut in late 2025 both AI Pro and AI Ultimate tiers had credit allowances reduced without proportional price drops, triggering significant cancellations and forum backlash.
- •IDE slowdowns on large monorepos TypeScript and very large projects can lag during AI generation, with performance still trailing Copilot inside VS Code on the same hardware.
- •No value outside the JetBrains ecosystem the VS Code plugin preview lacks feature parity, and developers on Cursor, Zed, or pure terminal workflows get nothing from this tool.
Our Verdict
JetBrains AI Assistant scores 7.5/10 because it nails IDE-native depth that no plugin can match, then loses points to credit volatility and a price tag three times Copilot's for buyers outside the JetBrains ecosystem. The integration with project graphs, refactoring tools, and VCS makes it the strongest option for teams already standardised on IntelliJ, PyCharm, WebStorm, or GoLand.
For the Vibe Builder, JetBrains AI Assistant is overkill unless you already pay for an IntelliJ-based IDE. The free tier with 3 credits and unlimited local Ollama is fine for a casual try, but the real productivity gains assume you live inside the IDE every day. If you only ship a couple of side projects in a simple editor, this tool will not pay for itself.
For the Developer, this is the default choice for JetBrains-standardised teams. Mellum-powered completion, Junie's autonomous multi-step agent, and the .aiignore privacy controls handle the workflows that matter: refactors across files, test generation that matches existing style, commit messages from diffs, and BYOK to keep an existing OpenAI or Anthropic spend. The MCP and ACP registry support means external agents like Claude Code plug in without leaving the IDE.
Skip it if your team splits between JetBrains and VS Code, since the VS Code preview plugin is not yet production-parity. Also skip if you primarily want completion plus chat at the lowest price -- in that case, consider GitHub Copilot at $10/month for comparable features without the JetBrains-IDE prerequisite, or try Cursor for a faster agent loop in a standalone editor.
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Frequently Asked Questions
How much does JetBrains AI Assistant cost?
JetBrains AI Free is $0 with 3 credits per 30 days. AI Pro costs $10/month with 10 credits, AI Ultimate is $30/month with 35 credits, and AI Enterprise is $60/user/month with on-premise deployment. Top-up credits remain $1 each in 2026 and stay valid for 12 months. Annual billing on paid tiers saves about 20%.
JetBrains AI Assistant vs GitHub Copilot: which should I pick?
JetBrains AI Assistant wins for developers who live inside IntelliJ, PyCharm, or WebStorm, with deeper project understanding and the Junie multi-step agent. GitHub Copilot wins on price ($10/month flat with no credit ceiling) and works better in VS Code. Choose JetBrains AI Assistant when your team is standardised on JetBrains IDEs and uses Junie.
Does JetBrains AI Assistant work with VS Code?
There is a JetBrains AI Assistant preview plugin for VS Code with basic agent capabilities, but full feature parity only exists inside JetBrains IDEs. The 2026 VS Code integration improves Junie support but still lacks Mellum-powered completions and several refactor features available natively in IntelliJ-based products.
Can I use my own OpenAI or Anthropic API key with JetBrains AI Assistant?
Yes. JetBrains AI Pro and Ultimate support Bring Your Own Key for OpenAI and Anthropic. AI Enterprise extends BYOK to Azure OpenAI, Amazon Bedrock, and Google Vertex AI. BYOK bypasses the credit system and is a popular 2026 choice for teams with existing model subscriptions or compliance requirements.
What is Junie in JetBrains AI Assistant?
Junie is JetBrains' own autonomous coding agent that handles multi-step tasks like cross-file refactors and feature scaffolding. It is included in AI Pro ($10/month) and AI Ultimate ($30/month) and works inside IntelliJ IDEA Ultimate, PyCharm Pro, WebStorm, GoLand, PhpStorm, Rider, RubyMine, and RustRover. JetBrains added Junie in the 2025-2026 release cycle.
Is JetBrains AI Assistant free?
Yes, JetBrains AI Assistant offers a free version. Paid plans start at $10/month.
Who should use JetBrains AI Assistant?
JetBrains AI Assistant is built for vibe builders who want AI to handle the technical work and developers looking to accelerate their workflow. Common use cases include ide-native-ai-coding, ai-test-generation, code-refactoring, commit-message-generation, autonomous-coding-agent.
What are the best alternatives to JetBrains AI Assistant?
Popular alternatives to JetBrains AI Assistant include Cursor, Claude Code, Cline. Compare features and pricing in our Coding directory to compare options.
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JetBrains AI Assistant
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