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- Starts at
- $20/mo
- Free trial
- Free in ChatGPT Free/Go (limited time)
- Best for
- Developers already paying for ChatGPT
- Last tested
- 2026-05-15
Quick verdict
Why we recommend OpenAI Codex
- No separate subscription if you already pay for ChatGPT
- Works across CLI, IDE and mobile
Best for
- Developers already paying for ChatGPT
Not ideal for
- Rate limits are usage-based and not published as hard numbers
- Model access changed under users — GPT-5.4/5.4 mini access was removed from Codex sign-in on 31 Aug 2026
Pros
- No separate subscription if you already pay for ChatGPT
- Works across CLI, IDE and mobile
Cons
- Rate limits are usage-based and not published as hard numbers
- Model access changed under users — GPT-5.4/5.4 mini access was removed from Codex sign-in on 31 Aug 2026
Key features
- Runs on the web, CLI, IDE extension and iOS
- Cloud-based background tasks
- Rides the existing ChatGPT Plus/Pro/Business/Enterprise seat — no separate subscription
- 5-hour plus weekly rate-limit windows shared between local and cloud runs
- Extra usage credits purchasable without upgrading plan
Pricing
Pricing changes frequently — always confirm the latest plans on the official website.
Considering OpenAI Codex? Compare the alternatives
Find OpenAI Codex alternatives
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Our coverage of OpenAI Codex
OpenAI Codex FAQ
Is OpenAI Codex worth it?+
OpenAI Codex has not been scored against our rubric yet. It's best for developers already paying for chatgpt. No separate subscription if you already pay for ChatGPT.
Who is OpenAI Codex best for?+
OpenAI Codex is best for Developers already paying for ChatGPT. Strengths: No separate subscription if you already pay for ChatGPT Works across CLI, IDE and mobile
What are the best OpenAI Codex alternatives?+
Top alternatives are Cursor, GitHub Copilot. Use the comparison links above to see how they stack up.
How much does OpenAI Codex cost?+
OpenAI Codex starts at $20/mo. Free trial: Free in ChatGPT Free/Go (limited time).
What are the downsides of OpenAI Codex?+
Rate limits are usage-based and not published as hard numbers Model access changed under users — GPT-5.4/5.4 mini access was removed from Codex sign-in on 31 Aug 2026
Final verdict on OpenAI Codex
Not yet scored against our rubric.
Best use case: Developers already paying for ChatGPT
OpenAI's coding agent, bundled into ChatGPT
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