Name: OpenAI Codex
Author: OpenAI

Question 1

Is OpenAI Codex free to use?

Accepted Answer

There is a free tier, but the most useful capabilities — cloud task delegation, automated PR review, and higher usage limits — come with paid plans (Plus at $20/month, plus Pro, Business, and Enterprise tiers). Billing is token/credit-based, so heavy agentic runs cost more.

Question 2

How is Codex different from ChatGPT or Cursor?

Accepted Answer

ChatGPT is a general chat assistant; Codex is a dedicated software-engineering agent that works across your actual repo via CLI, IDE, web, and app, running tasks in parallel cloud sandboxes and opening pull requests. Cursor is an AI-native editor, whereas Codex centers on autonomous, delegatable agent runs backed by GPT-5.x-Codex models.