Update reference-model-inference-completions.md

Author: santiagxf

articles/ai-studio/reference/reference-model-inference-completions.md

@@ -28,6 +28,14 @@ POST /completions?api-version=2024-04-01-preview
 | --- | --- | --- | --- | --- |
 | api-version | query | True | string | The version of the API in the format "YYYY-MM-DD" or "YYYY-MM-DD-preview". |
 
+## Request Header
+
+
+| Name | Required | Type | Description |
+| --- | --- | --- | --- |
+| extra-parameters | | string | The behavior of the API when extra parameters are indicated in the payload. Using `pass-through` makes the API to pass the parameter to the underlying model. Use this value when you want to pass parameters that you know the underlying model can support. Using `ignore` makes the API to drop any unsupported parameter. Use this value when you need to use the same payload across different models, but one of the extra parameters may make a model to error out if not supported. Using `error` makes the API to reject any extra parameter in the payload. Only parameters specified in this API can be indicated, or a 400 error is returned. |
+| azureml-model-deployment |     | string | Name of the deployment you want to route the request to. Supported for endpoints that support multiple deployments. |
+
 
 ## Request Body
 
@@ -285,4 +293,4 @@ The object type, which is always "list".
 | detail | [Detail](#detail) |     |
 | error | string | The error description. |
 | message | string | The error message. |
-| status | integer | The HTTP status code. |
+| status | integer | The HTTP status code. |