diff --git a/VERSION b/VERSION
index 3e3c866e..e58c88de 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.1.222
+1.1.227
diff --git a/scripts/test-official-models.js b/scripts/test-official-models.js
new file mode 100644
index 00000000..d87953fa
--- /dev/null
+++ b/scripts/test-official-models.js
@@ -0,0 +1,108 @@
+#!/usr/bin/env node
+/**
+ * 官方模型版本识别测试 - 最终版 v2
+ */
+
+const { isOpus45OrNewer } = require('../src/utils/modelHelper')
+
+// 官方模型
+const officialModels = [
+  { name: 'claude-3-opus-20240229', desc: 'Opus 3 (已弃用)', expectPro: false },
+  { name: 'claude-opus-4-20250514', desc: 'Opus 4.0', expectPro: false },
+  { name: 'claude-opus-4-1-20250805', desc: 'Opus 4.1', expectPro: false },
+  { name: 'claude-opus-4-5-20251101', desc: 'Opus 4.5', expectPro: true }
+]
+
+// 非 Opus 模型
+const nonOpusModels = [
+  { name: 'claude-sonnet-4-20250514', desc: 'Sonnet 4' },
+  { name: 'claude-sonnet-4-5-20250929', desc: 'Sonnet 4.5' },
+  { name: 'claude-haiku-4-5-20251001', desc: 'Haiku 4.5' },
+  { name: 'claude-3-5-haiku-20241022', desc: 'Haiku 3.5' },
+  { name: 'claude-3-haiku-20240307', desc: 'Haiku 3' },
+  { name: 'claude-3-7-sonnet-20250219', desc: 'Sonnet 3.7 (已弃用)' }
+]
+
+// 其他格式测试
+const otherFormats = [
+  { name: 'claude-opus-4.5', expected: true, desc: 'Opus 4.5 点分隔' },
+  { name: 'claude-opus-4-5', expected: true, desc: 'Opus 4.5 横线分隔' },
+  { name: 'opus-4.5', expected: true, desc: 'Opus 4.5 无前缀' },
+  { name: 'opus-4-5', expected: true, desc: 'Opus 4-5 无前缀' },
+  { name: 'opus-latest', expected: true, desc: 'Opus latest' },
+  { name: 'claude-opus-5', expected: true, desc: 'Opus 5 (未来)' },
+  { name: 'claude-opus-5-0', expected: true, desc: 'Opus 5.0 (未来)' },
+  { name: 'opus-4.0', expected: false, desc: 'Opus 4.0' },
+  { name: 'opus-4.1', expected: false, desc: 'Opus 4.1' },
+  { name: 'opus-4.4', expected: false, desc: 'Opus 4.4' },
+  { name: 'opus-4', expected: false, desc: 'Opus 4' },
+  { name: 'opus-4-0', expected: false, desc: 'Opus 4-0' },
+  { name: 'opus-4-1', expected: false, desc: 'Opus 4-1' },
+  { name: 'opus-4-4', expected: false, desc: 'Opus 4-4' },
+  { name: 'opus', expected: false, desc: '仅 opus' },
+  { name: null, expected: false, desc: 'null' },
+  { name: '', expected: false, desc: '空字符串' }
+]
+
+console.log('='.repeat(90))
+console.log('官方模型版本识别测试 - 最终版 v2')
+console.log('='.repeat(90))
+console.log()
+
+let passed = 0
+let failed = 0
+
+// 测试官方 Opus 模型
+console.log('📌 官方 Opus 模型:')
+for (const m of officialModels) {
+  const result = isOpus45OrNewer(m.name)
+  const status = result === m.expectPro ? '✅ PASS' : '❌ FAIL'
+  if (result === m.expectPro) {
+    passed++
+  } else {
+    failed++
+  }
+  const proSupport = result ? 'Pro 可用 ✅' : 'Pro 不可用 ❌'
+  console.log(`  ${status} | ${m.name.padEnd(32)} | ${m.desc.padEnd(18)} | ${proSupport}`)
+}
+
+console.log()
+console.log('📌 非 Opus 模型 (不受此函数影响):')
+for (const m of nonOpusModels) {
+  const result = isOpus45OrNewer(m.name)
+  console.log(
+    `  ➖      | ${m.name.padEnd(32)} | ${m.desc.padEnd(18)} | ${result ? '⚠️ 异常' : '正确跳过'}`
+  )
+  if (result) {
+    failed++ // 非 Opus 模型不应返回 true
+  }
+}
+
+console.log()
+console.log('📌 其他格式测试:')
+for (const m of otherFormats) {
+  const result = isOpus45OrNewer(m.name)
+  const status = result === m.expected ? '✅ PASS' : '❌ FAIL'
+  if (result === m.expected) {
+    passed++
+  } else {
+    failed++
+  }
+  const display = m.name === null ? 'null' : m.name === '' ? '""' : m.name
+  console.log(
+    `  ${status} | ${display.padEnd(25)} | ${m.desc.padEnd(18)} | ${result ? 'Pro 可用' : 'Pro 不可用'}`
+  )
+}
+
+console.log()
+console.log('='.repeat(90))
+console.log('测试结果:', passed, '通过,', failed, '失败')
+console.log('='.repeat(90))
+
+if (failed > 0) {
+  console.log('\n❌ 有测试失败，请检查函数逻辑')
+  process.exit(1)
+} else {
+  console.log('\n✅ 所有测试通过！函数可以安全使用')
+  process.exit(0)
+}
diff --git a/src/services/claudeAccountService.js b/src/services/claudeAccountService.js
index 29a7821e..77630364 100644
--- a/src/services/claudeAccountService.js
+++ b/src/services/claudeAccountService.js
@@ -16,6 +16,22 @@ const {
 const tokenRefreshService = require('./tokenRefreshService')
 const LRUCache = require('../utils/lruCache')
 const { formatDateWithTimezone, getISOStringWithTimezone } = require('../utils/dateHelper')
+const { isOpus45OrNewer } = require('../utils/modelHelper')
+
+/**
+ * Check if account is Pro (not Max)
+ * Compatible with both API real-time data (hasClaudePro) and local config (accountType)
+ * @param {Object} info - Subscription info object
+ * @returns {boolean}
+ */
+function isProAccount(info) {
+  // API real-time status takes priority
+  if (info.hasClaudePro === true && info.hasClaudeMax !== true) {
+    return true
+  }
+  // Local configured account type
+  return info.accountType === 'claude_pro'
+}
 
 class ClaudeAccountService {
   constructor() {
@@ -852,31 +868,39 @@ class ClaudeAccountService {
           !this.isSubscriptionExpired(account)
       )
 
-      // 如果请求的是 Opus 模型，过滤掉 Pro 和 Free 账号
+      // Filter Opus models based on account type and model version
       if (modelName && modelName.toLowerCase().includes('opus')) {
+        const isNewOpus = isOpus45OrNewer(modelName)
+
         activeAccounts = activeAccounts.filter((account) => {
-          // 检查账号的订阅信息
           if (account.subscriptionInfo) {
             try {
               const info = JSON.parse(account.subscriptionInfo)
-              // Pro 和 Free 账号不支持 Opus
-              if (info.hasClaudePro === true && info.hasClaudeMax !== true) {
-                return false // Claude Pro 不支持 Opus
+
+              // Free account: does not support any Opus model
+              if (info.accountType === 'free') {
+                return false
               }
-              if (info.accountType === 'claude_pro' || info.accountType === 'claude_free') {
-                return false // 明确标记为 Pro 或 Free 的账号不支持
+
+              // Pro account: only supports Opus 4.5+
+              if (isProAccount(info)) {
+                return isNewOpus
               }
+
+              // Max account: supports all Opus versions
+              return true
             } catch (e) {
-              // 解析失败，假设为旧数据，默认支持（兼容旧数据为 Max）
+              // Parse failed, assume legacy data (Max), default support
               return true
             }
           }
-          // 没有订阅信息的账号，默认当作支持（兼容旧数据）
+          // Account without subscription info, default to supported (legacy data compatibility)
           return true
         })
 
         if (activeAccounts.length === 0) {
-          throw new Error('No Claude accounts available that support Opus model')
+          const modelDesc = isNewOpus ? 'Opus 4.5+' : 'legacy Opus (requires Max subscription)'
+          throw new Error(`No Claude accounts available that support ${modelDesc} model`)
         }
       }
 
@@ -970,31 +994,39 @@ class ClaudeAccountService {
           !this.isSubscriptionExpired(account)
       )
 
-      // 如果请求的是 Opus 模型，过滤掉 Pro 和 Free 账号
+      // Filter Opus models based on account type and model version
       if (modelName && modelName.toLowerCase().includes('opus')) {
+        const isNewOpus = isOpus45OrNewer(modelName)
+
         sharedAccounts = sharedAccounts.filter((account) => {
-          // 检查账号的订阅信息
           if (account.subscriptionInfo) {
             try {
               const info = JSON.parse(account.subscriptionInfo)
-              // Pro 和 Free 账号不支持 Opus
-              if (info.hasClaudePro === true && info.hasClaudeMax !== true) {
-                return false // Claude Pro 不支持 Opus
+
+              // Free account: does not support any Opus model
+              if (info.accountType === 'free') {
+                return false
               }
-              if (info.accountType === 'claude_pro' || info.accountType === 'claude_free') {
-                return false // 明确标记为 Pro 或 Free 的账号不支持
+
+              // Pro account: only supports Opus 4.5+
+              if (isProAccount(info)) {
+                return isNewOpus
               }
+
+              // Max account: supports all Opus versions
+              return true
             } catch (e) {
-              // 解析失败，假设为旧数据，默认支持（兼容旧数据为 Max）
+              // Parse failed, assume legacy data (Max), default support
               return true
             }
           }
-          // 没有订阅信息的账号，默认当作支持（兼容旧数据）
+          // Account without subscription info, default to supported (legacy data compatibility)
           return true
         })
 
         if (sharedAccounts.length === 0) {
-          throw new Error('No shared Claude accounts available that support Opus model')
+          const modelDesc = isNewOpus ? 'Opus 4.5+' : 'legacy Opus (requires Max subscription)'
+          throw new Error(`No shared Claude accounts available that support ${modelDesc} model`)
         }
       }
 
diff --git a/src/services/unifiedClaudeScheduler.js b/src/services/unifiedClaudeScheduler.js
index 54446ec7..aac79971 100644
--- a/src/services/unifiedClaudeScheduler.js
+++ b/src/services/unifiedClaudeScheduler.js
@@ -5,7 +5,33 @@ const ccrAccountService = require('./ccrAccountService')
 const accountGroupService = require('./accountGroupService')
 const redis = require('../models/redis')
 const logger = require('../utils/logger')
-const { parseVendorPrefixedModel } = require('../utils/modelHelper')
+const { parseVendorPrefixedModel, isOpus45OrNewer } = require('../utils/modelHelper')
+
+/**
+ * Check if account is Pro (not Max)
+ *
+ * ACCOUNT TYPE LOGIC (as of 2025-12-05):
+ * Pro accounts can be identified by either:
+ *   1. API real-time data: hasClaudePro=true && hasClaudeMax=false
+ *   2. Local config data: accountType='claude_pro'
+ *
+ * Account type restrictions for Opus models:
+ *   - Free account: No Opus access at all
+ *   - Pro account: Only Opus 4.5+ (new versions)
+ *   - Max account: All Opus versions (legacy 3.x, 4.0, 4.1 and new 4.5+)
+ *
+ * Compatible with both API real-time data (hasClaudePro) and local config (accountType)
+ * @param {Object} info - Subscription info object
+ * @returns {boolean} - true if Pro account (not Free, not Max)
+ */
+function isProAccount(info) {
+  // API real-time status takes priority
+  if (info.hasClaudePro === true && info.hasClaudeMax !== true) {
+    return true
+  }
+  // Local configured account type
+  return info.accountType === 'claude_pro'
+}
 
 class UnifiedClaudeScheduler {
   constructor() {
@@ -46,8 +72,14 @@ class UnifiedClaudeScheduler {
         return false
       }
 
-      // 2. Opus 模型的订阅级别检查
+      // 2. Opus model subscription level check
+      // VERSION RESTRICTION LOGIC:
+      // - Free: No Opus models
+      // - Pro: Only Opus 4.5+ (isOpus45OrNewer = true)
+      // - Max: All Opus versions
       if (requestedModel.toLowerCase().includes('opus')) {
+        const isNewOpus = isOpus45OrNewer(requestedModel)
+
         if (account.subscriptionInfo) {
           try {
             const info =
@@ -55,27 +87,36 @@ class UnifiedClaudeScheduler {
                 ? JSON.parse(account.subscriptionInfo)
                 : account.subscriptionInfo
 
-            // Pro 和 Free 账号不支持 Opus
-            if (info.hasClaudePro === true && info.hasClaudeMax !== true) {
+            // Free account: does not support any Opus model
+            if (info.accountType === 'free') {
               logger.info(
-                `🚫 Claude account ${account.name} (Pro) does not support Opus model${context ? ` ${context}` : ''}`
+                `🚫 Claude account ${account.name} (Free) does not support Opus model${context ? ` ${context}` : ''}`
               )
               return false
             }
-            if (info.accountType === 'claude_pro' || info.accountType === 'claude_free') {
-              logger.info(
-                `🚫 Claude account ${account.name} (${info.accountType}) does not support Opus model${context ? ` ${context}` : ''}`
-              )
-              return false
+
+            // Pro account: only supports Opus 4.5+
+            // Reject legacy Opus (3.x, 4.0-4.4) but allow new Opus (4.5+)
+            if (isProAccount(info)) {
+              if (!isNewOpus) {
+                logger.info(
+                  `🚫 Claude account ${account.name} (Pro) does not support legacy Opus model${context ? ` ${context}` : ''}`
+                )
+                return false
+              }
+              // Opus 4.5+ supported
+              return true
             }
+
+            // Max account: supports all Opus versions (no restriction)
           } catch (e) {
-            // 解析失败，假设为旧数据，默认支持（兼容旧数据为 Max）
+            // Parse failed, assume legacy data (Max), default support
             logger.debug(
               `Account ${account.name} has invalid subscriptionInfo${context ? ` ${context}` : ''}, assuming Max`
             )
           }
         }
-        // 没有订阅信息的账号，默认当作支持（兼容旧数据）
+        // Account without subscription info, default to supported (legacy data compatibility)
       }
     }
 
diff --git a/src/utils/modelHelper.js b/src/utils/modelHelper.js
index cc954cc2..a42ee317 100644
--- a/src/utils/modelHelper.js
+++ b/src/utils/modelHelper.js
@@ -70,9 +70,119 @@ function getVendorType(modelStr) {
   return vendor
 }
 
+/**
+ * Check if the model is Opus 4.5 or newer.
+ *
+ * VERSION LOGIC (as of 2025-12-05):
+ * - Opus 4.5+ (including 5.0, 6.0, etc.) → returns true (Pro account eligible)
+ * - Opus 4.4 and below (including 3.x, 4.0, 4.1) → returns false (Max account only)
+ *
+ * Supported naming formats:
+ *   - New format: claude-opus-{major}[-{minor}][-date], e.g., claude-opus-4-5-20251101
+ *   - New format: claude-opus-{major}.{minor}, e.g., claude-opus-4.5
+ *   - Old format: claude-{version}-opus[-date], e.g., claude-3-opus-20240229
+ *   - Special: opus-latest, claude-opus-latest → always returns true
+ *
+ * @param {string} modelName - Model name
+ * @returns {boolean} - Whether the model is Opus 4.5 or newer
+ */
+function isOpus45OrNewer(modelName) {
+  if (!modelName) {
+    return false
+  }
+
+  const lowerModel = modelName.toLowerCase()
+  if (!lowerModel.includes('opus')) {
+    return false
+  }
+
+  // Handle 'latest' special case
+  if (lowerModel.includes('opus-latest') || lowerModel.includes('opus_latest')) {
+    return true
+  }
+
+  // Old format: claude-{version}-opus (version before opus)
+  // e.g., claude-3-opus-20240229, claude-3.5-opus
+  const oldFormatMatch = lowerModel.match(/claude[- ](\d+)(?:[.-](\d+))?[- ]opus/)
+  if (oldFormatMatch) {
+    const majorVersion = parseInt(oldFormatMatch[1], 10)
+    const minorVersion = oldFormatMatch[2] ? parseInt(oldFormatMatch[2], 10) : 0
+
+    // Old format version refers to Claude major version
+    // majorVersion > 4: 5.x, 6.x, ... → true
+    // majorVersion === 4 && minorVersion >= 5: 4.5, 4.6, ... → true
+    // Others (3.x, 4.0-4.4): → false
+    if (majorVersion > 4) {
+      return true
+    }
+    if (majorVersion === 4 && minorVersion >= 5) {
+      return true
+    }
+    return false
+  }
+
+  // New format 1: opus-{major}.{minor} (dot-separated)
+  // e.g., claude-opus-4.5, opus-4.5
+  const dotFormatMatch = lowerModel.match(/opus[- ]?(\d+)\.(\d+)/)
+  if (dotFormatMatch) {
+    const majorVersion = parseInt(dotFormatMatch[1], 10)
+    const minorVersion = parseInt(dotFormatMatch[2], 10)
+
+    // Same version logic as old format
+    // opus-5.0, opus-6.0 → true
+    // opus-4.5, opus-4.6 → true
+    // opus-4.0, opus-4.4 → false
+    if (majorVersion > 4) {
+      return true
+    }
+    if (majorVersion === 4 && minorVersion >= 5) {
+      return true
+    }
+    return false
+  }
+
+  // New format 2: opus-{major}[-{minor}][-date] (hyphen-separated)
+  // e.g., claude-opus-4-5-20251101, claude-opus-4-20250514, claude-opus-4-1-20250805
+  // If opus-{major} is followed by 8-digit date, there's no minor version
+
+  // Extract content after 'opus'
+  const opusIndex = lowerModel.indexOf('opus')
+  const afterOpus = lowerModel.substring(opusIndex + 4)
+
+  // Match: -{major}-{minor}-{date} or -{major}-{date} or -{major}
+  // IMPORTANT: Minor version regex is (\d{1,2}) not (\d+)
+  // This prevents matching 8-digit dates as minor version
+  // Example: opus-4-20250514 → major=4, minor=undefined (not 20250514)
+  // Example: opus-4-5-20251101 → major=4, minor=5
+  // Future-proof: Supports up to 2-digit minor versions (0-99)
+  const versionMatch = afterOpus.match(/^[- ](\d+)(?:[- ](\d{1,2})(?=[- ]\d{8}|$))?/)
+
+  if (versionMatch) {
+    const majorVersion = parseInt(versionMatch[1], 10)
+    const minorVersion = versionMatch[2] ? parseInt(versionMatch[2], 10) : 0
+
+    // Same version logic: >= 4.5 returns true
+    // opus-5-0-date, opus-6-date → true
+    // opus-4-5-date, opus-4-10-date → true (supports 2-digit minor)
+    // opus-4-date (no minor, treated as 4.0) → false
+    // opus-4-1-date, opus-4-4-date → false
+    if (majorVersion > 4) {
+      return true
+    }
+    if (majorVersion === 4 && minorVersion >= 5) {
+      return true
+    }
+    return false
+  }
+
+  // Other cases containing 'opus' but cannot parse version, assume legacy
+  return false
+}
+
 module.exports = {
   parseVendorPrefixedModel,
   hasVendorPrefix,
   getEffectiveModel,
-  getVendorType
+  getVendorType,
+  isOpus45OrNewer
 }