# Versions

| Id | What |
|---|---|
| `ap-latest` | Stable alias. |
| `ap-preview` | Newest; may change. |
| `ap-1.0.0` | Pinned; never changes. |

Send `version` in the body. The response always names the pinned id that answered. Pin after you tune thresholds. `GET /v1/versions` lists them.