AI code editors & assistants / Coding agent

OpenAI Codex

OpenAI's cloud and CLI coding agent

Good for

Background coding tasks · PRs

Free tier
Yes — Free $0 — limited Codex on quick tasks in the desktop app
Starting price
$20/month (ChatGPT Plus; full Codex in CLI, IDE, web and cloud; Go at $8/mo is desktop-only and lightweight)
Skill level
intermediate

[OK] checked 2026-10-15 on the official site

Get started

  1. Open the official site: https://openai.com/codex
  2. Start on the free tier to test it on your task.
  3. Try it on your real task before committing.
Visit OpenAI Codex ↗

Alternatives

Claude CodeJules

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