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Codex

Codex is the OpenAI coding agent we list separately from ChatGPT because the experience is a separate app and developer workflow. It can read a repo, edit files, run commands and tests, and move work toward a reviewed branch instead of staying as advice in a chat.

Our rating
●●●●●
Pricing
Free / ChatGPT plan
Last re-tested
July 6, 2026
Website
openai.com/codex →
VERDICT
Show it separately from ChatGPT. The billing may be bundled, but the job is different: Codex is where repo work, tests, and implementation loops happen.

Best for

  • Repo work where the agent needs to inspect files, edit code, and run the test loop
  • Turning scoped specs into implementation branches, bug fixes, migrations, or cleanup passes
  • Parallel agent work across projects when we need multiple code tasks moving at once
  • Keeping code execution separate from general ChatGPT prompts and content work

Skip if

  • The person using it does not want to review diffs, terminal output, or code changes
  • The task touches production access, destructive git work, or credentials without explicit guardrails
  • You only need a simple coding explanation; ChatGPT or Claude may be faster

Pricing breakdown

Plan
Cost
What you get
Included access
ChatGPT plan
OpenAI lists Codex as included across Free, Go, Plus, Pro, Business, Edu, and Enterprise plans; usage still depends on plan limits.
Free access
$0
Free includes limited Codex access, which is useful for evaluation before moving heavier repo work onto a paid plan.
Go and paid plans
Plan-dependent
Go also includes limited Codex access, while Plus, Pro, Business, Edu, and Enterprise can change limits, credits, controls, and collaboration options.
Business use
Varies by plan
For heavier coding-agent work, evaluate plan limits, workspace controls, GitHub permissions, and cloud/local execution needs.

Playbooks that use Codex

PLAYBOOK · Subscription Cleanup

Clean up subscriptions with Codex.

Use Codex to find recurring subscriptions, prepare an unsubscribe plan, get your approval, and clean up the inbox work you do not want to do by hand.

Beginner·25 min
PLAYBOOK · AI Chief of Staff

Build your personal AI chief of staff.

Connect a few read-only sources, ask for a weekly decision brief, and make the assistant ask before it sends, spends, edits, or deletes anything.

Beginner·30 min