Tool

OpenAI Codex

OpenAI's coding agent in ChatGPT, the CLI and IDEs that reads your repo, fixes bugs and opens or reviews pull requests.

Free tier

Yes

Starting price

$8/mo

Pricing

Included in ChatGPT plans. Free ($0) and Go ($8/mo) get lightweight use in the desktop app (subject to rollout); Plus ($20/mo) adds web, CLI, IDE and cloud code review; Pro from $100/mo. Usage limits are shared with ChatGPT Work.

Updated

19 Oct 2026

Open tool

• coding-agent
• ai-coding
• code-review
• cli

Picked for

• Which AI tool should I use to fix bugs in my codebase? Rank 3

Sources

• developers.openai.com — Codex pricing