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Best AI Extensions 2026
Find the best AI coding extensions for VS Code — adding code completion, natural language editing, inline chat, error explanation, documentation generation, and test writing capabilities directly in the editor. These extensions represent the most practical way most developers integrate AI into their daily workflow. Compare model quality, context window size, free tier limits, privacy options, and language support.
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Best AI Extensions 2026 - Frequently Asked Questions
What is the best AI extension for VS Code?▾
GitHub Copilot is the most widely used AI code extension — deep VS Code integration, GitHub ecosystem benefits, and strong code completion quality. Codeium is the best free alternative with comparable completion quality. Tabnine offers on-device processing for privacy-sensitive codebases. Continue.dev is an open-source option that supports local models via Ollama for developers who want full privacy.
How does GitHub Copilot differ from GitHub Copilot Chat?▾
GitHub Copilot provides inline code completions as you type — ghost text suggestions that autocomplete based on context. Copilot Chat is a sidebar conversation interface where you ask questions about your code, request explanations, debug errors, and give natural language instructions. Copilot (inline) is passive; Copilot Chat is interactive. Both are included in the Copilot subscription.
Can I use AI code assistants with local models for privacy?▾
Yes. Continue.dev connects to local models (Llama, Mistral, CodeLlama) running via Ollama or LM Studio — keeping all code on your machine with no external API calls. Ollama runs locally on Mac, Linux, and Windows. Code quality from smaller local models is lower than cloud models, but sufficient for many completion tasks while maintaining full code privacy.