JetBrains IDEs Integrate Google Gemini 3 Pro for Advanced AI Coding Assistance

JetBrains has seamlessly integrated Google's latest AI model, Gemini 3 Pro, into its suite of IDEs, elevating the capabilities of AI Chat and the coding agent Junie. Available immediately for subscribers, this update—detailed in a November 2025 post on the JetBrains AI Blog—delivers smarter reasoning, enhanced instruction following, and multimodal processing tailored for developers.

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## Core Enhancements Reshaping Daily Workflows Gemini 3 Pro addresses key pain points in AI-assisted development: - **Codebase Contextualization**: By learning from your project's code, it generates outputs that align with existing conventions, minimizing revisions during code reviews. - **Robust Instruction Processing**: Excelling in reasoning over text, code, and visuals, it handles intricate prompts and extensive documents with higher accuracy. - **Frontend Specialization**: Significant advances in multimodal UI generation make it particularly effective for complex layouts and interactive components. These features position Gemini 3 Pro as a powerhouse for orchestrating multi-step tasks, bridging ideation to deployable code more efficiently than predecessors. ## Real-World Demonstration: Sketch to Production-Ready UI JetBrains illustrated the model's potential by converting a basic sketch into a fully functional landing page. Starting with an uploaded image and a detailed prompt, Gemini 3 Pro discerned layout, structure, and visual hierarchy. Junie then implemented a responsive prototype complete with inferred components. Subsequent refinements, such as requests to "make it fancy," produced an elevated design featuring animations, smooth transitions, and styling inspired by contemporary AI sites like Adaline.ai—all while maintaining structural fidelity. This workflow exemplifies how multimodal AI can accelerate frontend prototyping.

// Example workflow inference:
// Input: Sketch + "Build responsive landing page"
// Output: HTML/CSS/JS with responsive sections, animations

> "Gemini 3 Pro shows clear improvements that matter in day-to-day development: understands your codebase and adapts to your style." — Anna Maltseva, JetBrains ## Activation and Accessibility To leverage Gemini 3 Pro: 1. Ensure an active JetBrains AI subscription (free trials available in-IDE). 2. For **AI Chat**, initiate a new session (defaults to Auto model). 3. For **Junie**, navigate to Settings | Junie | Models and select Gemini 3 Pro.

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This integration reflects JetBrains' ongoing commitment to embedding frontier AI models into developer tools, potentially setting a new benchmark for IDE productivity amid intensifying competition in AI-augmented coding environments.