FoundationModels · IOS API REFERENCE

LanguageModelSession.Usage.Output

struct · iOS 27.0+ · SDK 27.1

struct Output

Token counts for the output produced by the model.

Members (5)

init · iOS 27.0+

init

TypeScript

static init(totalTokenCount: number, reasoningTokenCount: number): LanguageModelSession_Usage_Output

Swift declaration

init(totalTokenCount: Int, reasoningTokenCount: Int)

Creates an output token count. - Parameters: - totalTokenCount: The total number of output tokens. - reasoningTokenCount: The number of output tokens from reasoning.

get · iOS 27.0+

totalTokenCount

TypeScript

get totalTokenCount(): number

Swift declaration

var totalTokenCount: Int

The total number of output tokens.

set · iOS 27.0+

totalTokenCount

TypeScript

set totalTokenCount(value: number)

Swift declaration

var totalTokenCount: Int

The total number of output tokens.

get · iOS 27.0+

reasoningTokenCount

TypeScript

get reasoningTokenCount(): number

Swift declaration

var reasoningTokenCount: Int

The number of output tokens that were part of the model's reasoning output. This value is always less than or equal to ``totalTokenCount``. A non-zero value requires the model to declare the ``LanguageModelCapabilities/Capability/reasoning`` capability.

set · iOS 27.0+

reasoningTokenCount

TypeScript

set reasoningTokenCount(value: number)

Swift declaration

var reasoningTokenCount: Int

Skipped declarations

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