# Cursor ditches VS Code, but not everyone is happy...

Source: https://www.youtube.com/watch?v=JSuS-zXMVwE
Recap page: https://rapidrecap.app/video/JSuS-zXMVwE
Generated: 2026-04-06T23:05:31.164+00:00

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## Quick Overview

Cursor 3.0 has evolved from a VS Code fork into a completely rewritten, Rust-based platform designed to shift developer focus from writing individual lines of code to managing autonomous AI agent swarms. This transition enables users to execute complex tasks across multiple repositories, machines, and cloud environments simultaneously while utilizing the new in-house Composer 2 model, which offers frontier-level performance at a significantly lower cost than competitors.

**Key Points:**
- Cursor 3.0 abandons its origins as a VS Code fork and utilizes a new, custom-built interface written in Rust and TypeScript.
- The new Composer 2 coding model delivers superior performance benchmarks compared to Claude Opus 4.6 while maintaining lower input and output token costs.
- Agent Swarms allow developers to run multiple AI agents in parallel across different codebases and servers to build complex features autonomously.
- Plan Mode facilitates the creation of project architectures and structured to-do lists, which agents then execute with minimal human intervention.
- Built-in browser integration provides immediate, real-time testing and visual feedback of the application being developed.
- The platform requires human input only when agents hit blockers, such as needing specific permissions for terminal commands, indicated by a yellow status dot.

![Screenshot at 00:27: The Agent Swarms feature interface, which allows users to manage multiple AI agents executing tasks across various repositories simultaneously.](https://ss.rapidrecap.app/screens/JSuS-zXMVwE/00-00-27.jpg)

**Context:** Cursor began as a VS Code fork focused on AI-assisted code completion. Over two years, it has progressed from a simple copilot tool to a sophisticated environment where AI agents take the lead in engineering tasks. The 3.0 release marks a significant architectural shift, moving away from the VS Code dependency to a custom, high-performance engine that prioritizes AI-driven development over manual coding.

## Detailed Analysis

Cursor 3.0 represents a fundamental shift in software development, moving from a coding-centric model to an agent-centric one. By rewriting the editor in Rust and TypeScript, the team has optimized the system for high-concurrency AI operations. The introduction of Composer 2, a model developed in-house and trained using reinforcement learning, provides a cost-effective alternative to existing LLMs while outperforming them in specialized coding tasks. The platform's new workflow emphasizes autonomous execution: developers provide high-level instructions, and the system handles the architecture, implementation, and deployment, including the management of complex tasks like Docker containerization and remote server access. Despite some community pushback regarding the departure from the familiar VS Code ecosystem, the new interface offers significant utility for developers looking to automate the majority of their software lifecycle.

### Evolution of Cursor

- From VS Code fork to independent platform
- Complete rewrite in Rust and TypeScript for improved performance
- Introduction of autonomous Agent Swarms for multi-repo management

### Composer 2 Capabilities

- In-house trained model using reinforced learning
- Frontier-level coding performance exceeding Claude Opus 4.6
- Optimized cost structure at $0.50/M input and $2.50/M output tokens

### Workflow Features

- Plan Mode for architectural structuring
- Integrated browser for immediate visual feedback
- Human-in-the-loop status monitoring via color-coded indicators

![Screenshot at 00:11: The model selection interface in Cursor 2.0, showing the range of available AI models including Composer 1 and Sonnet 4.5.](https://ss.rapidrecap.app/screens/JSuS-zXMVwE/00-00-11.jpg)
![Screenshot at 00:38: Performance vs. Cost benchmark graph demonstrating the superior efficiency and intelligence of the Composer 2 model.](https://ss.rapidrecap.app/screens/JSuS-zXMVwE/00-00-38.jpg)
![Screenshot at 02:55: Demonstration of 'Plan Mode' in the new Cursor interface, allowing for structured project architectural planning.](https://ss.rapidrecap.app/screens/JSuS-zXMVwE/00-02-55.jpg)
![Screenshot at 03:31: The interface showing 13,369 lines of code generated, highlighting the scale of autonomous work handled by the agents.](https://ss.rapidrecap.app/screens/JSuS-zXMVwE/00-03-31.jpg)