Cursor

Cursor is the AI code editor built by Anysphere — in 2026 the de-facto standard among developers thanks to deep integration of Claude and GPT models directly in the editing experience.

Cursor 3 (April 2026) ships the Agents Window: a side panel that runs multiple AI agents in parallel across different branches. Tab autocomplete predicts up to 20 lines ahead, and Composer writes whole features from a natural-language prompt.

Cursor is a VS Code fork: all your extensions and keybindings just work. Settings sync and one-click import from VS Code make migration painless.

Key features

• Tab autocomplete up to 20 lines, multi-file aware.
• Composer: writes whole features from natural language.
• Agents Window: parallel AI agents (Cursor 3).
• Codebase index: whole-repo understanding via embeddings.
• Bring Your Own Key: use your own Anthropic / OpenAI API key.
• VS Code fork: compatible with all extensions and themes.