---
title: usage
framework: foundationmodels
role: symbol
role_heading: Instance Property
path: foundationmodels/languagemodelsession/usage-swift.property
---

# usage

The total accumulated usage across all responses generated by this session.

## Declaration

```swift
final var usage: LanguageModelSession.Usage { get }
```

## Discussion

Discussion This value increases monotonically over the lifetime of the session.

## See Also

### Inspecting a session

- [LanguageModelSession.Usage](foundationmodels/languagemodelsession/usage-swift.struct.md)
- [properties](foundationmodels/languagemodelsession/properties.md)
- [transcriptErrorHandlingPolicy](foundationmodels/languagemodelsession/transcripterrorhandlingpolicy.md)