I replaced VS Code with Cursor AI 3.0 for three weeks on real projects: a Node.js API, a React frontend, and a PostgreSQL migration script. Here's what I found.

What Really Changes With Cursor 3.0

The multi-file Composer mode is the killer feature: Cursor can simultaneously modify 10–15 files coherently, understand an entire project's dependencies, and propose complex refactoring in seconds.

  • Agent mode: terminal command execution, Git management, automatic tests
  • Full project indexing (up to 100,000 files)
  • Native support for all LLMs: Claude 4, GPT-5, Gemini Ultra
  • Price: $20/month (Pro), $40/month (Business)

The main limitation is the tendency to over-generate code that would compile but isn't idiomatic in your codebase. Careful review remains essential.