Function calculateTokenCost

calculateTokenCost(
usage: RawTokenUsageMetadata | null | undefined,
model?: string,
): OkfTokenUsage
Calculates exact token counts and cost in USD from usage metadata.
Parameters
- usage: RawTokenUsageMetadata | null | undefined
  Raw usage metadata returned from the AI model API.
- model: string = 'gemini-2.5-flash'
  Identifier of the model used.
Returns OkfTokenUsage
Standardized OkfTokenUsage with cost in USD.
- Defined in cost.ts:36