Claude Code and Cursor aren't just different products — they represent two fundamentally different philosophies for how AI should assist with code. Understanding the architecture difference is key to choosing between them.
An AI agent operates like an autonomous contractor. You hand it a brief; it reads everything it needs, makes decisions, executes, validates, and delivers.
Reads your codebase, understands the task, creates a step-by-step execution plan
Runs commands, edits files, creates new files — without prompting you at each step
Runs tests, checks output, sees errors, and fixes them autonomously
Repeats until the task is done or it surfaces a decision that requires human input
An AI IDE assistant operates like a very smart pair programmer. It suggests, you decide. You stay in control of every change.
Tab completion predicts your next edit in real time — you accept, modify, or ignore
Cmd-K and chat respond to your specific prompts — you control what gets changed
Changes are shown as diffs for you to review before applying
You decide which suggestions to keep — the AI never commits without approval
The line between agents and IDE assistants is blurring. Both products are moving toward the other's territory:
Despite convergence, the fundamental architecture difference — terminal agent vs IDE plugin — means they still feel and behave very differently in 2026.