Token usage statistics for the response.
| Property | Type | Description |
|---|---|---|
| input_tokens | Integer | Number of input tokens. |
| input_tokens_details | Response_Usage_Input_Details | Breakdown of the input tokens. |
| output_tokens | Integer | Number of output tokens. |
| output_tokens_details | Response_Usage_Output_Details | Breakdown of the output tokens. |
| total_tokens | Integer | Total number of tokens used in the request (input + output). |