# OpenResponsesReasoningSummaryPartAddedEvent
Event emitted when a reasoning summary part is added
## Fields
| Field | Type | Required | Description | Example |
| ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| `type` | [models.OpenResponsesReasoningSummaryPartAddedEventType](../models/openresponsesreasoningsummarypartaddedeventtype.md) | :heavy_check_mark: | N/A | |
| `output_index` | *float* | :heavy_check_mark: | N/A | |
| `item_id` | *str* | :heavy_check_mark: | N/A | |
| `summary_index` | *float* | :heavy_check_mark: | N/A | |
| `part` | [models.ReasoningSummaryText](../models/reasoningsummarytext.md) | :heavy_check_mark: | N/A | {
"type": "summary_text",
"text": "Analyzed the problem using first principles"
} |
| `sequence_number` | *float* | :heavy_check_mark: | N/A | |