fix(usage): persist cost multiplier at provider level instead of also at the logger level (#1433)

* feat(changelog): added changelog

* fix(usage): persist cost multiplier at provider level

* Revert "feat(changelog): added changelog"

This reverts commit 885d10c.

---------

Co-authored-by: waleed <waleed>

Author: waleedlatif1

apps/sim/app/api/billing/update-cost/route.ts

@@ -9,7 +9,7 @@ import { createLogger } from '@/lib/logs/console/logger'
 import { generateRequestId } from '@/lib/utils'
 import { calculateCost } from '@/providers/utils'
 
-const logger = createLogger('billing-update-cost')
+const logger = createLogger('BillingUpdateCostAPI')
 
 const UpdateCostSchema = z.object({
   userId: z.string().min(1, 'User ID is required'),

apps/sim/lib/logs/execution/logger.ts

@@ -11,7 +11,7 @@ import { eq, sql } from 'drizzle-orm'
 import { v4 as uuidv4 } from 'uuid'
 import { getHighestPrioritySubscription } from '@/lib/billing/core/subscription'
 import { checkUsageStatus, maybeSendUsageThresholdEmail } from '@/lib/billing/core/usage'
-import { getCostMultiplier, isBillingEnabled } from '@/lib/environment'
+import { isBillingEnabled } from '@/lib/environment'
 import { createLogger } from '@/lib/logs/console/logger'
 import { emitWorkflowExecutionCompleted } from '@/lib/logs/events'
 import { snapshotService } from '@/lib/logs/execution/snapshot/service'
@@ -195,9 +195,7 @@ export class ExecutionLogger implements IExecutionLoggerService {
         if (usr?.email) {
           const sub = await getHighestPrioritySubscription(usr.id)
 
-          const costMultiplier = getCostMultiplier()
-          const costDelta =
-            (costSummary.baseExecutionCharge || 0) + (costSummary.modelCost || 0) * costMultiplier
+          const costDelta = costSummary.totalCost
 
           const planName = sub?.plan || 'Free'
           const scope: 'user' | 'organization' =
@@ -399,9 +397,7 @@ export class ExecutionLogger implements IExecutionLoggerService {
       }
 
       const userId = workflowRecord.userId
-      const costMultiplier = getCostMultiplier()
-      // Apply cost multiplier only to model costs, not base execution charge
-      const costToStore = costSummary.baseExecutionCharge + costSummary.modelCost * costMultiplier
+      const costToStore = costSummary.totalCost
 
       const existing = await db.select().from(userStats).where(eq(userStats.userId, userId))
       if (existing.length === 0) {

apps/sim/providers/index.ts

@@ -1,3 +1,4 @@
+import { getCostMultiplier } from '@/lib/environment'
 import { createLogger } from '@/lib/logs/console/logger'
 import type { StreamingExecution } from '@/executor/types'
 import type { ProviderRequest, ProviderResponse } from '@/providers/types'
@@ -87,7 +88,15 @@ export async function executeProviderRequest(
     const useCachedInput = !!request.context && request.context.length > 0
 
     if (shouldBillModelUsage(response.model)) {
-      response.cost = calculateCost(response.model, promptTokens, completionTokens, useCachedInput)
+      const costMultiplier = getCostMultiplier()
+      response.cost = calculateCost(
+        response.model,
+        promptTokens,
+        completionTokens,
+        useCachedInput,
+        costMultiplier,
+        costMultiplier
+      )
     } else {
       response.cost = {
         input: 0,

apps/sim/providers/utils.ts

@@ -496,13 +496,11 @@ export function calculateCost(
  * Get pricing information for a specific model (including embedding models)
  */
 export function getModelPricing(modelId: string): any {
-  // First check if it's an embedding model
   const embeddingPricing = getEmbeddingModelPricing(modelId)
   if (embeddingPricing) {
     return embeddingPricing
   }
 
-  // Then check chat models
   return getModelPricingFromDefinitions(modelId)
 }
 
@@ -516,20 +514,15 @@ export function formatCost(cost: number): string {
   if (cost === undefined || cost === null) return '—'
 
   if (cost >= 1) {
-    // For costs >= $1, show two decimal places
     return `$${cost.toFixed(2)}`
   }
   if (cost >= 0.01) {
-    // For costs between 1¢ and $1, show three decimal places
     return `$${cost.toFixed(3)}`
   }
   if (cost >= 0.001) {
-    // For costs between 0.1¢ and 1¢, show four decimal places
     return `$${cost.toFixed(4)}`
   }
   if (cost > 0) {
-    // For very small costs, still show as fixed decimal instead of scientific notation
-    // Find the first non-zero digit and show a few more places
     const places = Math.max(4, Math.abs(Math.floor(Math.log10(cost))) + 3)
     return `$${cost.toFixed(places)}`
   }