Quick answer: AI-first IDE — code with Claude / GPT inline, agentic refactors across files.
Cursor is an AI-first code editor built by Anysphere that integrates Claude and GPT models directly into your development workflow. It functions as a modern IDE alternative, allowing developers to write, refactor, and debug code with inline AI assistance. Rather than switching between your editor and a separate AI chat, Cursor embeds AI capabilities throughout the interface—from intelligent code completion to agentic refactoring that understands context across multiple files. The tool is designed for developers who want AI as a core part of their coding experience, not an afterthought. Cursor offers a freemium model with a Pro tier ($20/month) that unlocks faster AI responses and advanced features. It's built on familiar foundations (based on VS Code's codebase) but purpose-built for an AI-augmented development experience.