Returned when an earlier assistant audio message item is truncated by the client.
| Name | Type | Description | Notes |
|---|---|---|---|
| eventId | String | The unique ID of the server event. | |
| type | String | The event type, must be "conversation.item.truncated". | |
| itemId | String | The ID of the assistant message item that was truncated. | |
| contentIndex | Integer | The index of the content part that was truncated. | |
| audioEndMs | Integer | The duration up to which the audio was truncated, in milliseconds. |