# RunStepObject
## Properties
**id** | **String** | The identifier of the run step, which can be referenced in API endpoints. |
**object** | **String** | The object type, which is always `thread.run.step`. |
**created_at** | **i32** | The Unix timestamp (in seconds) for when the run step was created. |
**assistant_id** | **String** | The ID of the [assistant](/docs/api-reference/assistants) associated with the run step. |
**thread_id** | **String** | The ID of the [thread](/docs/api-reference/threads) that was run. |
**run_id** | **String** | The ID of the [run](/docs/api-reference/runs) that this run step is a part of. |
**r#type** | **String** | The type of run step, which can be either `message_creation` or `tool_calls`. |
**status** | **String** | The status of the run step, which can be either `in_progress`, `cancelled`, `failed`, `completed`, or `expired`. |
**step_details** | [**models::RunStepObjectStepDetails**](RunStepObject_step_details.md) | |
**last_error** | Option<[**models::Object014**](Object0_14.md)> | |
**expired_at** | Option<**i32**> | The Unix timestamp (in seconds) for when the run step expired. A step is considered expired if the parent run is expired. |
**cancelled_at** | Option<**i32**> | The Unix timestamp (in seconds) for when the run step was cancelled. |
**failed_at** | Option<**i32**> | The Unix timestamp (in seconds) for when the run step failed. |
**completed_at** | Option<**i32**> | The Unix timestamp (in seconds) for when the run step completed. |
**metadata** | Option<**std::collections::HashMap<String, String>**> | Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard. Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters. |
**usage** | Option<[**models::RunStepCompletionUsage**](RunStepCompletionUsage.md)> | |
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