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Cursor is an AI-powered code editor built for modern software development. Unlike simple code completion tools, Cursor offers autonomous coding agents that can build, test, and demonstrate features end-to-end while developers focus on higher-level decisions. Built as a fork of VS Code, it supports multi-file editing through Composer, parallel agent execution, automated CI failure resolution, and codebase-aware suggestions. Users can choose from multiple frontier models including GPT-5.6, Claude Opus 5, Gemini 3.1 Pro, and Grok 4.5. Trusted by teams at Stripe, NVIDIA, and over half of the Fortune 500.

GitHub Copilot is an AI pair programmer that suggests code directly inside your editor. Rather than switching between documentation and your IDE, Copilot understands the context of what you are building and offers completions for individual lines, entire functions, or whole files. It can convert comments into working code, explain unfamiliar code in plain English, and translate between programming languages. The platform has evolved beyond autocomplete with Agent Mode that autonomously executes coding tasks and Coding Agent that handles assigned issues asynchronously through cloud development environments.

Codeium Windsurf is an AI-powered code editor built for software development. It offers intelligent code completion, multi-file editing, and autonomous agents that can handle coding tasks end-to-end. Built as a fork of VS Code, it supports familiar workflows while adding AI capabilities. Features include Cascade, an AI agent that understands your codebase and can plan, write, test, and iterate on features. Windsurf supports multiple AI models and works across major IDEs including VS Code, JetBrains, and Neovim.