# OpenResponsesStreamEventResponseFunctionCallArgumentsDelta

Event emitted when function call arguments are being streamed


## Fields

| Field                                                                                                        | Type                                                                                                         | Required                                                                                                     | Description                                                                                                  |
| ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------ |
| `type`                                                                                                       | [components.TypeResponseFunctionCallArgumentsDelta](../components/typeresponsefunctioncallargumentsdelta.md) | :heavy_check_mark:                                                                                           | N/A                                                                                                          |
| `item_id`                                                                                                    | *str*                                                                                                        | :heavy_check_mark:                                                                                           | N/A                                                                                                          |
| `output_index`                                                                                               | *float*                                                                                                      | :heavy_check_mark:                                                                                           | N/A                                                                                                          |
| `delta`                                                                                                      | *str*                                                                                                        | :heavy_check_mark:                                                                                           | N/A                                                                                                          |
| `sequence_number`                                                                                            | *float*                                                                                                      | :heavy_check_mark:                                                                                           | N/A                                                                                                          |