Changelog
Changelog
The API has not shipped a public release yet, so there is nothing to list. What follows is the policy that entries will be written against — worth reading before you pin anything.
No entries yet. This page will carry one line per released model version and per API change, newest first, once v1 is public.
How versions move
| Exact versions | Never change behaviour. echo-1.0.0 today is echo-1.0.0 in a year. |
| Aliases | Move when a new version ships. echo-1 and echo-latest are conveniences, not guarantees. |
| Deprecation | Advertised on every response via the Deprecation and Sunset headers, long before anything is removed. |
| Retirement | 410 with a migrate_to pointer. Never a silent redirect to a different model. |
| Error codes | Once a code ships it does not change meaning. |
If output stability matters to you, pin a key with default_model_pin — it resolves once, at key creation, so nothing on this page can move it. More on that →