# OpenAI
LLMS index: [llms.txt](/llms.txt)
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## OpenAI Attributes
This group defines attributes for OpenAI.
**Attributes:**
| Key | Stability | Value Type | Description | Example Values |
| --- | --- | --- | --- | --- |
| `openai.api.type` |  | string | The type of OpenAI API being used. | `chat_completions`; `responses` |
| `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.api.type` 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 |
| --- | --- | --- |
| `chat_completions` | The OpenAI [Chat Completions API](https://developers.openai.com/api/reference/chat-completions/overview). |  |
| `responses` | The OpenAI [Responses API](https://developers.openai.com/api/reference/responses/overview). |  |
---
`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. |  |