Usage statistics related to the run step. This value will be null while the run step's status is in_progress.
| Name | Type | Description | Notes |
|---|---|---|---|
| completionTokens | Integer | Number of completion tokens used over the course of the run step. | |
| promptTokens | Integer | Number of prompt tokens used over the course of the run step. | |
| totalTokens | Integer | Total number of tokens used (prompt + completion). |