> ## Documentation Index
> Fetch the complete documentation index at: https://docs.simular.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# TokenUsage

> Token usage reported by a model service for one request.

Token usage reported by a model service for one request. Most backends
report it; today only \[`DecisionModel.decide`] surfaces it, as
`usage` on the returned object.

## Properties

<ResponseField name={"inputTokens"} type={"number"} required />

<ResponseField name={"outputTokens"} type={"number"} required />