Plans & cost

🎯Goal. Pick the plan that matches how hard you'll use Codex.

1. 1Codex is included in paid ChatGPT plans: Plus ($20/mo) for several focused coding sessions a week, Pro (from $100/mo) for 5× or 20× higher rate limits. A Free ($0) tier lets you explore and Go ($8/mo) suits lightweight tasks.
2. 2Business is pay-as-you-go; Enterprise & Edu are contact-sales. Usage is metered per model in rolling windows, so heavier models consume your allowance faster.
3. 3Or skip the subscription and pay per token via the OpenAI API — the CLI itself is free and open source; you pay only for model usage. Verify current numbers at developers.openai.com/codex.

✓You'll see. A clear match between your usage and a tier — Plus for regular study work, Pro only if you hit its limits.

💳Cost. Plus $20/mo · Pro from $100/mo · Go $8/mo · Free $0 · Business pay-as-you-go · Enterprise/Edu custom — plus API pay-per-token as an alternative.

💡Takeaway. Start on Plus (or Free/Go to try it); move up only when rate limits, not the tool, are what slows you down.