# OpenAI
## OpenAI Attributes
This group defines attributes for OpenAI.
| Attribute | Type | Description | Examples | Stability |
|---|---|---|---|---|
| `openai.request.service_tier` | string | The service tier requested. May be a specific tier, default, or auto. | `auto`; `default` |  |
| `openai.response.service_tier` | string | The service tier used for the response. | `scale`; `default` |  |
| `openai.response.system_fingerprint` | string | A fingerprint to track any eventual change in the Generative AI environment. | `fp_44709d6fcb` |  |
---
`openai.request.service_tier` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
|---|---|---|
| `auto` | The system will utilize scale tier credits until they are exhausted. |  |
| `default` | The system will utilize the default scale tier. |  |