Function getModelCosts

src/utils/modelCost.ts:144–164

(model: string, usage: Usage)

}

export function getModelCosts(model: string, usage: Usage): ModelCosts {
  const shortName = getCanonicalName(model)

  // Check if this is an Opus 4.6 model with fast mode active.
  if (
    shortName === firstPartyNameToCanonical(CLAUDE_OPUS_4_6_CONFIG.firstParty)
  ) {
    const isFastMode = usage.speed === 'fast'
    return getOpus46CostTier(isFastMode)
  }

  const costs = MODEL_COSTS[shortName]
  if (!costs) {
    trackUnknownModelCost(model, shortName)
    return (
      MODEL_COSTS[getCanonicalName(getDefaultMainLoopModelSetting())] ??
      DEFAULT_UNKNOWN_MODEL_COST
    )
  }
  return costs
}

function trackUnknownModelCost(model: string, shortName: ModelShortName): void {
  logEvent('tengu_unknown_model_cost', {