Feature Maturity
For the complete documentation index, see llms.txt. Markdown versions of documentation pages are available by appending
.mdto the page URL.
Some ChatGPT and Codex features ship behind a maturity label so you can understand how reliable each one is, what might change, and what level of support to expect.
| Maturity | What it means | Guidance |
|---|---|---|
| Under development | Not ready for use. | Don't use. |
| Experimental | Unstable and OpenAI may remove or change it. | Use at your own risk. |
| Beta | Ready for broad testing; complete in most respects, but some aspects may change based on user feedback. | OK for most evaluation and pilots; expect small changes. |
| Stable | Fully supported, documented, and ready for broad use; behavior and configuration remain consistent over time. | Safe for production use; removals typically go through a deprecation process. |