Claude Code vs Cursor vs AI IDEs: What Actually Changes Your Workflow?

The real decision: agent vs copilot

You have been hearing about Claude Code, Cursor, and the new wave of AI IDEs. But when you sit down to work, what actually changes? The answer is not which model is smarter. It is whether the tool can act on its own or just suggests code while you do the driving.

This article is a hands-on comparison. I will show you concrete terminal commands, config files, and agent loops you can run today. By the end, you will know which tool fits your workflow and how to set it up.

Here is the short version: Claude Code is an agentic CLI that can read your repo, run tests, and edit files. Cursor is an IDE with AI features that keep you in the editor. Other AI IDEs like Windsurf and GitHub Copilot Workspace fall somewhere in between. The choice depends on how much autonomy you want.

• Claude Code: terminal-based agent, runs commands, edits files, multi-step tasks
• Cursor: VS Code fork, inline completions, chat, agent mode
• Windsurf: IDE with agentic features, integrates with models
• Copilot Workspace: cloud-based, task-oriented, less local
• Your workflow: if you live in the terminal, agent CLI wins; if you live in the editor, AI IDE wins

Before you start

You need a few things to follow along. Node.js 18 or later, Git, and a terminal. You also need API keys for Anthropic and OpenAI if you want to test the agent loop. The tools themselves are free to install, but API usage costs money.

I am using a sample project called todo-app. It is a simple Node.js REST API. You can clone it or create your own. The commands work on macOS and Linux. If you are on Windows, use WSL.

mkdir todo-app && cd todo-app
npm init -y
npm install express
mkdir src && echo 'const express = require("express"); const app = express(); app.get("/", (req, res) => res.send("Hello")); app.listen(3000);' > src/index.js
node src/index.js

Claude Code: the agentic CLI

Once inside, you can give it a task. It will ask for permission before running commands. You can also use flags to run non-interactively, which is useful for CI or scripts.

Here is a quick example. I asked it to add a new /health endpoint. It created the file, updated the server, and ran the test.

claude -p "Add a /health endpoint that returns { status: 'ok' }"

• It has a permission system: you can allow or deny commands
• It can run tests and linters, and it will show you the output
• It works with any language because it uses your shell
• It is great for refactoring, debugging, and writing tests
• The downside: it is not an editor, so you still need one for manual tweaks

Cursor: the AI-powered editor

To use the agent mode, you press Cmd+Enter and describe a task. It will suggest changes and apply them to files. You can review the diff before accepting.

Here is an example of a Cursor rules file that makes the agent follow your project conventions. You put it in .cursor/rules.

{
  "rules": [
    {
      "description": "Always use async/await, never callbacks",
      "glob": "*.js"
    },
    {
      "description": "Use single quotes for strings",
      "glob": "*.js"
    }
  ]
}

• Inline completions are fast and often correct
• The chat panel can reference your current file and selection
• Agent mode can edit multiple files, but it is slower and more cautious
• It supports custom models via API keys, so you can use Claude or GPT-4
• It is great for developers who prefer a visual diff

Step 1: Set up a minimal agent loop

To understand what agentic tools do under the hood, I will show you a minimal agent loop. This is a script that calls an LLM, gets a tool call, executes the tool, and feeds the result back. This is the core of Claude Code and Cursor's agent mode.

You can run this with Node.js and an OpenAI-compatible API. I am using Anthropic's API, but you can adapt it.

const { Anthropic } = require('@anthropic-ai/sdk');
const { execSync } = require('child_process');

const client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });

const tools = [
  {
    name: 'run_command',
    description: 'Run a shell command',
    input_schema: {
      type: 'object',
      properties: { command: { type: 'string' } },
      required: ['command']
    }
  }
];

async function agent(task) {
  let messages = [{ role: 'user', content: task }];
  for (let i = 0; i < 5; i++) {
    const response = await client.messages.create({
      model: 'claude-3-5-sonnet-20241022',
      max_tokens: 1024,
      tools,
      messages
    });
    const content = response.content[0];
    if (content.type === 'text') {
      console.log(content.text);
      return;
    }
    if (content.type === 'tool_use') {
      const command = content.input.command;
      console.log('Running:', command);
      const output = execSync(command, { encoding: 'utf8' });
      messages.push({ role: 'assistant', content: [content] });
      messages.push({
        role: 'user',
        content: [{ type: 'tool_result', tool_use_id: content.id, content: output }]
      });
    }
  }
}

agent('List files in the current directory');

Step 2: Compare a real task side by side

Lets take a common task: add a GET /todos endpoint that returns a list of todos. I will run this in Claude Code and in Cursor, and compare the steps and output.

For Claude Code, I run the command non-interactively. For Cursor, I use the agent mode and describe the task. Here is what each tool did.

claude -p "Add a GET /todos endpoint that returns a hardcoded array of todos"

In Cursor, open the file src/index.js, press Cmd+Enter, type: "Add a GET /todos endpoint that returns a hardcoded array of todos", and review the diff.

• Claude Code: it read the file, added the endpoint, and ran the server to verify
• Cursor: it suggested changes in a diff, you click apply
• Claude Code is more autonomous: it can run commands without you reviewing every step
• Cursor is more controlled: you see the exact changes before they are applied
• Both are correct, but the workflow is different

What actually changes your workflow?

The biggest change is who is in control. With Claude Code, you hand off a task and let it run. You monitor the output and step in when needed. With Cursor, you are always in the loop, reviewing each suggestion.

For large refactors, I prefer Claude Code because it can run tests and fix issues iteratively. For quick edits and exploring code, Cursor is faster because you stay in the editor.

There is also a difference in context. Claude Code sees your whole repo and can use tools like grep and find. Cursor sees the open files and your selection, though its agent mode can also search the repo.

• Autonomy: Claude Code can run commands; Cursor asks for permission
• Context: Claude Code uses the whole repo; Cursor uses open files unless you use agent mode
• Workflow: Claude Code is terminal-first; Cursor is editor-first
• Learning curve: Claude Code requires CLI comfort; Cursor is familiar to VS Code users
• Cost: Claude Code uses your Anthropic API credits; Cursor has a subscription

Recommended setup

You can also configure Claude Code to use your Makefile. Just tell it to run make test, and it will. This makes the agent more reliable because it uses your existing scripts.

For Cursor, set up rules to match your style. This ensures that suggestions follow your conventions.

test:
	npm test

lint:
	npx eslint src

start:
	node src/index.js

# Add more targets as needed

Troubleshooting

If Claude Code refuses to run a command, check the permission settings. You can allowlist commands in settings.json.

If Cursor completions feel slow, try switching to a faster model like claude-3-5-haiku or gpt-4o-mini.

If the agent loop script fails, make sure your API key is set and the model ID is correct. Anthropic model IDs change, so check the docs.

• Claude Code: add commands to the allowlist in .claude/settings.json
• Cursor: clear the cache and restart if completions stop
• Agent loop: add error handling for failed tool calls
• Cost: monitor API usage to avoid surprise bills
• Security: never grant permission to arbitrary commands without review

FAQ

Answers to the questions that come up most often on this topic.

• Q: Can I use Claude Code with other models? A: No, it is tied to Anthropic models, but you can use the API with your own key.
• Q: Is Cursor free? A: There is a free tier, but the agent mode and some features require Pro.
• Q: Which is better for beginners? A: Cursor is easier to start with because it is an IDE, but Claude Code is more powerful once you are comfortable with the terminal.
• Q: Do these tools replace junior developers? A: No, they are tools that require oversight. They can make mistakes, especially with complex codebases.
• Q: Can I use both together? A: Yes, many developers use Claude Code for heavy tasks and Cursor for daily editing.

Next action

Try one tool today. If you are a terminal user, install Claude Code and run it on a small project. If you prefer an editor, download Cursor and try the agent mode.

Start with a simple task like adding a health endpoint. You will see the difference in autonomy and control. Then decide which workflow feels right for you.