## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.typesafe.ai/llms.txt)

Use this file to discover all available pages before exploring further.

Token usage for a request.

## Properties

### input_tokens

```
readonly input_tokens: number;
```

Number of input tokens used.

* * *

### output_tokens

```
readonly output_tokens: number;
```

Number of output tokens used.