Interface: ModelUsageMetrics

Defined in: ports/model-turn-response.ts:8

Token usage and cost metrics returned by a single ModelDriver.invokeTurn() call.

Tracks non-cached input tokens, prefix-cached input tokens, output/reasoning tokens, and USD cost.

Properties

Property	Modifier	Type	Description	Defined in
cachedInputTokens	readonly	number	Number of prefix-cached input tokens read during the turn.	ports/model-turn-response.ts:12
costUsd	readonly	number	Total monetary cost in USD for the turn.	ports/model-turn-response.ts:16
inputTokens	readonly	number	Number of non-cached input tokens billed for the turn.	ports/model-turn-response.ts:10
outputTokens	readonly	number	Number of output and reasoning tokens generated during the turn.	ports/model-turn-response.ts:14