OpenAI Codex
Codex is OpenAI's coding agent available as a CLI, IDE extension and cloud agent, included with ChatGPT plans or billed via API key.
Free tierOpen sourcefrom $8/moVerified
Our verdict
OpenAI's coding agent as a CLI, IDE extension and cloud agent, included with ChatGPT plans. The obvious pick if you already pay for ChatGPT.
Best for
- ✓ ChatGPT subscribers
- ✓ Cloud agents that work on tasks in the background
- ✓ Open-source CLI
Watch out for
- ! Usage limits vary by plan and model
Pricing
Read from the official pricing page. Prices in USD; always confirm on the vendor's site.
| Plan | Price | Details |
|---|---|---|
| Free | Free | For quick coding tasks; limits not listed |
| Go | $8/mo | For lightweight coding tasks |
| Plus | $20/mo | Five-hour local-message estimates vary by model |
| Pro | $100/mo | From $100; plans at $100, $200 or $500/month; no five-hour limit |
| Business | $25/mo | Per user; $20/user/month billed annually (2+ users) |
| Enterprise & Edu | Custom | Contact sales. Check site. |
| API key | $0 + usage | Billed at OpenAI API rates; per-token prices not on this page |
Note: Pricing URL redirects to learn.chatgpt.com/docs/pricing. Open source applies to the Codex CLI (openai/codex, Apache-2.0); the hosted service is proprietary.
Open source (Apache-2.0).
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