diff --git a/src/middleware/auth.js b/src/middleware/auth.js
index 66fa1387..cf76b0b7 100644
--- a/src/middleware/auth.js
+++ b/src/middleware/auth.js
@@ -9,7 +9,7 @@ const ClientValidator = require('../validators/clientValidator')
 const ClaudeCodeValidator = require('../validators/clients/claudeCodeValidator')
 const claudeRelayConfigService = require('../services/claudeRelayConfigService')
 const { calculateWaitTimeStats } = require('../utils/statsHelper')
-const { isOpusModel } = require('../utils/modelHelper')
+const { isClaudeFamilyModel } = require('../utils/modelHelper')
 
 // 工具函数
 function sleep(ms) {
@@ -1256,7 +1256,7 @@ const authenticateApiKey = async (req, res, next) => {
       const model = requestBody.model || ''
 
       // 判断是否为 Claude 模型
-      if (isOpusModel(model)) {
+      if (isClaudeFamilyModel(model)) {
         const weeklyOpusCost = validation.keyData.weeklyOpusCost || 0
 
         if (weeklyOpusCost >= weeklyOpusCostLimit) {
diff --git a/src/services/apiKeyService.js b/src/services/apiKeyService.js
index b51e6637..605707aa 100644
--- a/src/services/apiKeyService.js
+++ b/src/services/apiKeyService.js
@@ -4,7 +4,7 @@ const config = require('../../config/config')
 const redis = require('../models/redis')
 const logger = require('../utils/logger')
 const serviceRatesService = require('./serviceRatesService')
-const { isOpusModel } = require('../utils/modelHelper')
+const { isClaudeFamilyModel } = require('../utils/modelHelper')
 
 const ACCOUNT_TYPE_CONFIG = {
   claude: { prefix: 'claude:account:' },
@@ -1651,7 +1651,7 @@ class ApiKeyService {
   async recordOpusCost(keyId, ratedCost, realCost, model, accountType) {
     try {
       // 判断是否为 Claude 系列模型（包含 Bedrock 格式等）
-      if (!isOpusModel(model)) {
+      if (!isClaudeFamilyModel(model)) {
         return
       }
 
diff --git a/src/services/weeklyClaudeCostInitService.js b/src/services/weeklyClaudeCostInitService.js
index 2dfb1470..1268329f 100644
--- a/src/services/weeklyClaudeCostInitService.js
+++ b/src/services/weeklyClaudeCostInitService.js
@@ -2,7 +2,7 @@ const redis = require('../models/redis')
 const logger = require('../utils/logger')
 const pricingService = require('./pricingService')
 const serviceRatesService = require('./serviceRatesService')
-const { isOpusModel } = require('../utils/modelHelper')
+const { isClaudeFamilyModel } = require('../utils/modelHelper')
 
 function pad2(n) {
   return String(n).padStart(2, '0')
@@ -151,7 +151,7 @@ class WeeklyClaudeCostInitService {
             }
             const keyId = match[1]
             const model = match[2]
-            if (!isOpusModel(model)) {
+            if (!isClaudeFamilyModel(model)) {
               continue
             }
             matchedClaudeKeys++
diff --git a/src/utils/modelHelper.js b/src/utils/modelHelper.js
index 91fda718..c3fecc98 100644
--- a/src/utils/modelHelper.js
+++ b/src/utils/modelHelper.js
@@ -188,22 +188,6 @@ function isOpus45OrNewer(modelName) {
   return false
 }
 
-/**
- * 判断是否为 Opus 模型（任意版本）
- * 匹配所有包含 "opus" 关键词的 Claude 模型
- */
-function isOpusModel(modelName) {
-  if (!modelName || typeof modelName !== 'string') {
-    return false
-  }
-  const { baseModel } = parseVendorPrefixedModel(modelName)
-  const m = (baseModel || '').trim().toLowerCase()
-  if (!m) {
-    return false
-  }
-  return m.includes('opus')
-}
-
 /**
  * 判断某个 model 名称是否属于 Anthropic Claude 系列模型。
  *
@@ -253,6 +237,5 @@ module.exports = {
   getEffectiveModel,
   getVendorType,
   isOpus45OrNewer,
-  isOpusModel,
   isClaudeFamilyModel
 }