diff --git a/backend/internal/service/claude_token_provider.go b/backend/internal/service/claude_token_provider.go
index 9292979f..d70379c1 100644
--- a/backend/internal/service/claude_token_provider.go
+++ b/backend/internal/service/claude_token_provider.go
@@ -162,40 +162,5 @@ func (p *ClaudeTokenProvider) GetAccessToken(ctx context.Context, account *Accou
 }
 
 func (p *ClaudeTokenProvider) getServiceAccountAccessToken(ctx context.Context, account *Account) (string, error) {
-	key, err := parseVertexServiceAccountKey(account)
-	if err != nil {
-		return "", err
-	}
-	cacheKey := vertexServiceAccountCacheKey(account, key)
-
-	if p.tokenCache != nil {
-		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
-			return token, nil
-		}
-	}
-
-	locked := false
-	if p.tokenCache != nil {
-		var lockErr error
-		locked, lockErr = p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
-		if lockErr == nil && locked {
-			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
-		} else if lockErr != nil {
-			slog.Warn("vertex_service_account_token_lock_failed", "account_id", account.ID, "error", lockErr)
-		} else {
-			time.Sleep(claudeLockWaitTime)
-			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
-				return token, nil
-			}
-		}
-	}
-
-	accessToken, ttl, err := exchangeVertexServiceAccountToken(ctx, key)
-	if err != nil {
-		return "", err
-	}
-	if p.tokenCache != nil {
-		_ = p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl)
-	}
-	return accessToken, nil
+	return getVertexServiceAccountAccessToken(ctx, p.tokenCache, account)
 }
diff --git a/backend/internal/service/gateway_forward_as_chat_completions.go b/backend/internal/service/gateway_forward_as_chat_completions.go
index c531667e..7ac77f77 100644
--- a/backend/internal/service/gateway_forward_as_chat_completions.go
+++ b/backend/internal/service/gateway_forward_as_chat_completions.go
@@ -61,10 +61,15 @@ func (s *GatewayService) ForwardAsChatCompletions(
 
 	// 4. Model mapping
 	mappedModel := originalModel
-	if account.Type == AccountTypeAPIKey {
+	if account.Type == AccountTypeAPIKey || account.Type == AccountTypeServiceAccount {
 		mappedModel = account.GetMappedModel(originalModel)
 	}
-	if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type != AccountTypeAPIKey {
+	if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type == AccountTypeServiceAccount {
+		normalized := normalizeVertexAnthropicModelID(claude.NormalizeModelID(originalModel))
+		if normalized != originalModel {
+			mappedModel = normalized
+		}
+	} else if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type != AccountTypeAPIKey {
 		normalized := claude.NormalizeModelID(originalModel)
 		if normalized != originalModel {
 			mappedModel = normalized
diff --git a/backend/internal/service/gateway_forward_as_responses.go b/backend/internal/service/gateway_forward_as_responses.go
index 647193d6..8f8a1e94 100644
--- a/backend/internal/service/gateway_forward_as_responses.go
+++ b/backend/internal/service/gateway_forward_as_responses.go
@@ -58,10 +58,15 @@ func (s *GatewayService) ForwardAsResponses(
 	// 4. Model mapping
 	mappedModel := originalModel
 	reasoningEffort := ExtractResponsesReasoningEffortFromBody(body)
-	if account.Type == AccountTypeAPIKey {
+	if account.Type == AccountTypeAPIKey || account.Type == AccountTypeServiceAccount {
 		mappedModel = account.GetMappedModel(originalModel)
 	}
-	if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type != AccountTypeAPIKey {
+	if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type == AccountTypeServiceAccount {
+		normalized := normalizeVertexAnthropicModelID(claude.NormalizeModelID(originalModel))
+		if normalized != originalModel {
+			mappedModel = normalized
+		}
+	} else if mappedModel == originalModel && account.Platform == PlatformAnthropic && account.Type != AccountTypeAPIKey {
 		normalized := claude.NormalizeModelID(originalModel)
 		if normalized != originalModel {
 			mappedModel = normalized
diff --git a/backend/internal/service/gemini_messages_compat_service.go b/backend/internal/service/gemini_messages_compat_service.go
index 20293ac8..ea0c0d7d 100644
--- a/backend/internal/service/gemini_messages_compat_service.go
+++ b/backend/internal/service/gemini_messages_compat_service.go
@@ -515,6 +515,10 @@ func (s *GeminiMessagesCompatService) SelectAccountForAIStudioEndpoints(ctx cont
 			}
 			// Code Assist OAuth tokens often lack AI Studio scopes for models listing.
 			return 3
+		case AccountTypeServiceAccount:
+			// Vertex service accounts use aiplatform.googleapis.com, not the AI Studio
+			// endpoint (generativelanguage.googleapis.com), so they cannot serve these requests.
+			return 999
 		default:
 			return 10
 		}
diff --git a/backend/internal/service/gemini_token_provider.go b/backend/internal/service/gemini_token_provider.go
index c22f2131..172b9411 100644
--- a/backend/internal/service/gemini_token_provider.go
+++ b/backend/internal/service/gemini_token_provider.go
@@ -172,42 +172,7 @@ func (p *GeminiTokenProvider) GetAccessToken(ctx context.Context, account *Accou
 }
 
 func (p *GeminiTokenProvider) getServiceAccountAccessToken(ctx context.Context, account *Account) (string, error) {
-	key, err := parseVertexServiceAccountKey(account)
-	if err != nil {
-		return "", err
-	}
-	cacheKey := vertexServiceAccountCacheKey(account, key)
-
-	if p.tokenCache != nil {
-		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
-			return token, nil
-		}
-	}
-
-	locked := false
-	if p.tokenCache != nil {
-		var lockErr error
-		locked, lockErr = p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
-		if lockErr == nil && locked {
-			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
-		} else if lockErr != nil {
-			slog.Warn("vertex_service_account_token_lock_failed", "account_id", account.ID, "error", lockErr)
-		} else {
-			time.Sleep(200 * time.Millisecond)
-			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
-				return token, nil
-			}
-		}
-	}
-
-	accessToken, ttl, err := exchangeVertexServiceAccountToken(ctx, key)
-	if err != nil {
-		return "", err
-	}
-	if p.tokenCache != nil {
-		_ = p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl)
-	}
-	return accessToken, nil
+	return getVertexServiceAccountAccessToken(ctx, p.tokenCache, account)
 }
 
 func GeminiTokenCacheKey(account *Account) string {
diff --git a/backend/internal/service/vertex_service_account.go b/backend/internal/service/vertex_service_account.go
index d4130b93..4430cf81 100644
--- a/backend/internal/service/vertex_service_account.go
+++ b/backend/internal/service/vertex_service_account.go
@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"net/url"
 	"regexp"
@@ -23,6 +24,7 @@ const (
 	vertexDefaultTokenURL         = "https://oauth2.googleapis.com/token"
 	vertexCloudPlatformScope      = "https://www.googleapis.com/auth/cloud-platform"
 	vertexServiceAccountCacheSkew = 5 * time.Minute
+	vertexLockWaitTime            = 200 * time.Millisecond
 	vertexAnthropicVersion        = "vertex-2023-10-16"
 )
 
@@ -123,9 +125,8 @@ func parseVertexServiceAccountJSON(raw []byte) (*vertexServiceAccountKey, error)
 	if strings.TrimSpace(key.ProjectID) == "" {
 		return nil, errors.New("service account json missing project_id")
 	}
-	if strings.TrimSpace(key.TokenURI) == "" {
-		key.TokenURI = vertexDefaultTokenURL
-	}
+	// Always use the well-known Google token endpoint to prevent SSRF via crafted token_uri.
+	key.TokenURI = vertexDefaultTokenURL
 	return &key, nil
 }
 
@@ -141,6 +142,47 @@ func vertexServiceAccountCacheKey(account *Account, key *vertexServiceAccountKey
 	return "vertex:service_account:" + fingerprint
 }
 
+// getVertexServiceAccountAccessToken obtains an access token for a Vertex service account,
+// using the shared cache and distributed lock to avoid redundant exchanges.
+func getVertexServiceAccountAccessToken(ctx context.Context, cache GeminiTokenCache, account *Account) (string, error) {
+	key, err := parseVertexServiceAccountKey(account)
+	if err != nil {
+		return "", err
+	}
+	cacheKey := vertexServiceAccountCacheKey(account, key)
+
+	if cache != nil {
+		if token, err := cache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+			return token, nil
+		}
+	}
+
+	locked := false
+	if cache != nil {
+		var lockErr error
+		locked, lockErr = cache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
+		if lockErr == nil && locked {
+			defer func() { _ = cache.ReleaseRefreshLock(ctx, cacheKey) }()
+		} else if lockErr != nil {
+			slog.Warn("vertex_service_account_token_lock_failed", "account_id", account.ID, "error", lockErr)
+		} else {
+			time.Sleep(vertexLockWaitTime)
+			if token, err := cache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+				return token, nil
+			}
+		}
+	}
+
+	accessToken, ttl, err := exchangeVertexServiceAccountToken(ctx, key)
+	if err != nil {
+		return "", err
+	}
+	if cache != nil {
+		_ = cache.SetAccessToken(ctx, cacheKey, accessToken, ttl)
+	}
+	return accessToken, nil
+}
+
 func exchangeVertexServiceAccountToken(ctx context.Context, key *vertexServiceAccountKey) (string, time.Duration, error) {
 	now := time.Now()
 	claims := jwt.MapClaims{
diff --git a/frontend/src/components/account/CreateAccountModal.vue b/frontend/src/components/account/CreateAccountModal.vue
index e7a790ec..d38c31c5 100644
--- a/frontend/src/components/account/CreateAccountModal.vue
+++ b/frontend/src/components/account/CreateAccountModal.vue
@@ -276,7 +276,7 @@
           v-if="accountCategory === 'service_account'"
           class="mt-3 rounded-lg border border-sky-200 bg-sky-50 px-3 py-2 text-xs text-sky-800 dark:border-sky-800/40 dark:bg-sky-900/20 dark:text-sky-200"
         >
-          <p>使用 Google Cloud Service Account JSON 通过 Vertex AI 调用 Anthropic Claude。建议配置模型映射，将客户端 Claude 模型名映射到 Vertex 模型 ID。</p>
+          <p>{{ t('admin.accounts.vertexAnthropicHint') }}</p>
         </div>
       </div>
 
@@ -479,7 +479,7 @@
           v-if="accountCategory === 'service_account'"
           class="mt-3 rounded-lg border border-sky-200 bg-sky-50 px-3 py-2 text-xs text-sky-800 dark:border-sky-800/40 dark:bg-sky-900/20 dark:text-sky-200"
         >
-          <p>使用 Google Cloud Service Account JSON 访问 Vertex AI Gemini。建议将 Vertex 账号放入独立分组，避免和 AI Studio/Gemini OAuth 同模型混调。</p>
+          <p>{{ t('admin.accounts.vertexGeminiHint') }}</p>
         </div>
 
         <!-- OAuth Type Selection (only show when oauth-based is selected) -->
@@ -827,10 +827,10 @@
               <div class="min-w-0">
                 <div class="flex items-center gap-2 text-sm font-medium text-gray-900 dark:text-white">
                   <Icon name="upload" size="sm" />
-                  <span>{{ vertexClientEmail ? '已读取 Service Account JSON' : '拖入 Service Account JSON' }}</span>
+                  <span>{{ vertexClientEmail ? t('admin.accounts.vertexSaJsonLoaded') : t('admin.accounts.vertexSaJsonDrop') }}</span>
                 </div>
                 <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">
-                  {{ vertexClientEmail ? '密钥内容不会在表单中显示。' : '把 .json 文件拖到这里，或点击按钮选择文件。' }}
+                  {{ vertexClientEmail ? t('admin.accounts.vertexSaJsonKeyHidden') : t('admin.accounts.vertexSaJsonDropHint') }}
                 </p>
               </div>
               <button
@@ -839,7 +839,7 @@
                 @click="vertexServiceAccountFileInput?.click()"
               >
                 <Icon name="upload" size="sm" />
-                选择 JSON
+                {{ t('admin.accounts.vertexSaJsonSelectBtn') }}
               </button>
             </div>
             <div
@@ -850,7 +850,7 @@
               <div class="truncate">Client Email: <span class="font-mono">{{ vertexClientEmail }}</span></div>
             </div>
           </div>
-          <p class="input-hint">上传或拖入 JSON 后会自动读取 project_id，密钥内容仅用于创建账号提交。</p>
+          <p class="input-hint">{{ t('admin.accounts.vertexSaJsonUploadHint') }}</p>
         </div>
 
         <div class="grid grid-cols-1 gap-4 sm:grid-cols-2">
@@ -861,7 +861,7 @@
               type="text"
               class="input font-mono"
               readonly
-              placeholder="从 JSON 自动读取"
+              :placeholder="t('admin.accounts.vertexProjectIdPlaceholder')"
             />
           </div>
           <div>
@@ -872,7 +872,7 @@
               class="input font-mono"
             >
               <optgroup
-                v-for="group in vertexLocationOptions"
+                v-for="group in VERTEX_LOCATION_OPTIONS"
                 :key="group.label"
                 :label="group.label"
               >
@@ -885,7 +885,7 @@
                 </option>
               </optgroup>
             </select>
-            <p class="input-hint">不同 Vertex 模型可用 location 可能不同，这里选择账号默认 endpoint location。</p>
+            <p class="input-hint">{{ t('admin.accounts.vertexLocationHint') }}</p>
           </div>
         </div>
       </div>
@@ -3132,6 +3132,7 @@ import QuotaLimitCard from '@/components/account/QuotaLimitCard.vue'
 import { applyInterceptWarmup } from '@/components/account/credentialsBuilder'
 import { formatDateTimeLocalInput, parseDateTimeLocalInput } from '@/utils/format'
 import { createStableObjectKeyResolver } from '@/utils/stableObjectKey'
+import { VERTEX_LOCATION_OPTIONS } from '@/constants/account'
 import {
   OPENAI_WS_MODE_CTX_POOL,
   OPENAI_WS_MODE_OFF,
@@ -3318,52 +3319,6 @@ const vertexProjectId = ref('')
 const vertexClientEmail = ref('')
 const vertexLocation = ref('global')
 const vertexServiceAccountDragActive = ref(false)
-const vertexLocationOptions = [
-  {
-    label: 'Common',
-    options: [
-      { value: 'us-central1', label: 'us-central1 (Iowa)' },
-      { value: 'global', label: 'global' },
-      { value: 'us', label: 'us' },
-      { value: 'eu', label: 'eu' }
-    ]
-  },
-  {
-    label: 'United States',
-    options: [
-      { value: 'us-east1', label: 'us-east1 (South Carolina)' },
-      { value: 'us-east4', label: 'us-east4 (Northern Virginia)' },
-      { value: 'us-east5', label: 'us-east5 (Columbus)' },
-      { value: 'us-south1', label: 'us-south1 (Dallas)' },
-      { value: 'us-west1', label: 'us-west1 (Oregon)' },
-      { value: 'us-west4', label: 'us-west4 (Las Vegas)' }
-    ]
-  },
-  {
-    label: 'Europe',
-    options: [
-      { value: 'europe-west1', label: 'europe-west1 (Belgium)' },
-      { value: 'europe-west2', label: 'europe-west2 (London)' },
-      { value: 'europe-west3', label: 'europe-west3 (Frankfurt)' },
-      { value: 'europe-west4', label: 'europe-west4 (Netherlands)' },
-      { value: 'europe-west6', label: 'europe-west6 (Zurich)' },
-      { value: 'europe-west8', label: 'europe-west8 (Milan)' },
-      { value: 'europe-west9', label: 'europe-west9 (Paris)' }
-    ]
-  },
-  {
-    label: 'Asia Pacific',
-    options: [
-      { value: 'asia-east1', label: 'asia-east1 (Taiwan)' },
-      { value: 'asia-east2', label: 'asia-east2 (Hong Kong)' },
-      { value: 'asia-northeast1', label: 'asia-northeast1 (Tokyo)' },
-      { value: 'asia-northeast3', label: 'asia-northeast3 (Seoul)' },
-      { value: 'asia-south1', label: 'asia-south1 (Mumbai)' },
-      { value: 'asia-southeast1', label: 'asia-southeast1 (Singapore)' },
-      { value: 'australia-southeast1', label: 'australia-southeast1 (Sydney)' }
-    ]
-  }
-] as const
 const tempUnschedEnabled = ref(false)
 const tempUnschedRules = ref<TempUnschedRuleForm[]>([])
 const getModelMappingKey = createStableObjectKeyResolver<ModelMapping>('create-model-mapping')
@@ -4251,7 +4206,7 @@ const applyVertexServiceAccountJson = (value: string) => {
     const clientEmail = typeof parsed.client_email === 'string' ? parsed.client_email.trim() : ''
     const privateKey = typeof parsed.private_key === 'string' ? parsed.private_key.trim() : ''
     if (!projectId || !clientEmail || !privateKey) {
-      appStore.showError('Service Account JSON 缺少 project_id、client_email 或 private_key')
+      appStore.showError(t('admin.accounts.vertexSaJsonMissingFields'))
       return false
     }
     vertexProjectId.value = projectId
@@ -4259,7 +4214,7 @@ const applyVertexServiceAccountJson = (value: string) => {
     vertexServiceAccountJson.value = JSON.stringify(parsed)
     return true
   } catch {
-    appStore.showError('Service Account JSON 格式无效')
+    appStore.showError(t('admin.accounts.vertexSaJsonInvalid'))
     return false
   }
 }
@@ -4406,7 +4361,7 @@ const handleSubmit = async () => {
       return
     }
     if (!vertexLocation.value.trim()) {
-      appStore.showError('请填写 Vertex location')
+      appStore.showError(t('admin.accounts.vertexLocationRequired'))
       return
     }
     const credentials: Record<string, unknown> = {
diff --git a/frontend/src/components/account/EditAccountModal.vue b/frontend/src/components/account/EditAccountModal.vue
index 69e2186b..56874474 100644
--- a/frontend/src/components/account/EditAccountModal.vue
+++ b/frontend/src/components/account/EditAccountModal.vue
@@ -577,9 +577,9 @@
               type="text"
               class="input font-mono"
               readonly
-              placeholder="从 JSON 自动读取"
+              :placeholder="t('admin.accounts.vertexProjectIdPlaceholder')"
             />
-            <p class="input-hint">Service Account JSON 不在编辑页显示；需要更换 JSON 时请删除账号后重新创建。</p>
+            <p class="input-hint">{{ t('admin.accounts.vertexSaJsonEditHint') }}</p>
           </div>
           <div>
             <label class="input-label">Location</label>
@@ -589,7 +589,7 @@
               class="input font-mono"
             >
               <optgroup
-                v-for="group in vertexLocationOptions"
+                v-for="group in VERTEX_LOCATION_OPTIONS"
                 :key="group.label"
                 :label="group.label"
               >
@@ -602,7 +602,182 @@
                 </option>
               </optgroup>
             </select>
-            <p class="input-hint">不同 Vertex 模型可用 location 可能不同，这里选择账号默认 endpoint location。</p>
+            <p class="input-hint">{{ t('admin.accounts.vertexLocationHint') }}</p>
+          </div>
+        </div>
+
+        <!-- Model Restriction Section for Service Account -->
+        <div class="border-t border-gray-200 pt-4 dark:border-dark-600">
+          <label class="input-label">{{ t('admin.accounts.modelRestriction') }}</label>
+
+          <!-- Mode Toggle -->
+          <div class="mb-4 flex gap-2">
+            <button
+              type="button"
+              @click="modelRestrictionMode = 'whitelist'"
+              :class="[
+                'flex-1 rounded-lg px-4 py-2 text-sm font-medium transition-all',
+                modelRestrictionMode === 'whitelist'
+                  ? 'bg-primary-100 text-primary-700 dark:bg-primary-900/30 dark:text-primary-400'
+                  : 'bg-gray-100 text-gray-600 hover:bg-gray-200 dark:bg-dark-600 dark:text-gray-400 dark:hover:bg-dark-500'
+              ]"
+            >
+              <svg
+                class="mr-1.5 inline h-4 w-4"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+              >
+                <path
+                  stroke-linecap="round"
+                  stroke-linejoin="round"
+                  stroke-width="2"
+                  d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"
+                />
+              </svg>
+              {{ t('admin.accounts.modelWhitelist') }}
+            </button>
+            <button
+              type="button"
+              @click="modelRestrictionMode = 'mapping'"
+              :class="[
+                'flex-1 rounded-lg px-4 py-2 text-sm font-medium transition-all',
+                modelRestrictionMode === 'mapping'
+                  ? 'bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-400'
+                  : 'bg-gray-100 text-gray-600 hover:bg-gray-200 dark:bg-dark-600 dark:text-gray-400 dark:hover:bg-dark-500'
+              ]"
+            >
+              <svg
+                class="mr-1.5 inline h-4 w-4"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+              >
+                <path
+                  stroke-linecap="round"
+                  stroke-linejoin="round"
+                  stroke-width="2"
+                  d="M8 7h12m0 0l-4-4m4 4l-4 4m0 6H4m0 0l4 4m-4-4l4-4"
+                />
+              </svg>
+              {{ t('admin.accounts.modelMapping') }}
+            </button>
+          </div>
+
+          <!-- Whitelist Mode -->
+          <div v-if="modelRestrictionMode === 'whitelist'">
+            <ModelWhitelistSelector v-model="allowedModels" :platform="account?.platform || 'anthropic'" />
+            <p class="text-xs text-gray-500 dark:text-gray-400">
+              {{ t('admin.accounts.selectedModels', { count: allowedModels.length }) }}
+              <span v-if="allowedModels.length === 0">{{
+                t('admin.accounts.supportsAllModels')
+              }}</span>
+            </p>
+          </div>
+
+          <!-- Mapping Mode -->
+          <div v-else>
+            <div class="mb-3 rounded-lg bg-purple-50 p-3 dark:bg-purple-900/20">
+              <p class="text-xs text-purple-700 dark:text-purple-400">
+                <svg
+                  class="mr-1 inline h-4 w-4"
+                  fill="none"
+                  viewBox="0 0 24 24"
+                  stroke="currentColor"
+                >
+                  <path
+                    stroke-linecap="round"
+                    stroke-linejoin="round"
+                    stroke-width="2"
+                    d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
+                  />
+                </svg>
+                {{ t('admin.accounts.mapRequestModels') }}
+              </p>
+            </div>
+
+            <!-- Model Mapping List -->
+            <div v-if="modelMappings.length > 0" class="mb-3 space-y-2">
+              <div
+                v-for="(mapping, index) in modelMappings"
+                :key="getModelMappingKey(mapping)"
+                class="flex items-center gap-2"
+              >
+                <input
+                  v-model="mapping.from"
+                  type="text"
+                  class="input flex-1"
+                  :placeholder="t('admin.accounts.requestModel')"
+                />
+                <svg
+                  class="h-4 w-4 flex-shrink-0 text-gray-400"
+                  fill="none"
+                  viewBox="0 0 24 24"
+                  stroke="currentColor"
+                >
+                  <path
+                    stroke-linecap="round"
+                    stroke-linejoin="round"
+                    stroke-width="2"
+                    d="M14 5l7 7m0 0l-7 7m7-7H3"
+                  />
+                </svg>
+                <input
+                  v-model="mapping.to"
+                  type="text"
+                  class="input flex-1"
+                  :placeholder="t('admin.accounts.actualModel')"
+                />
+                <button
+                  type="button"
+                  @click="removeModelMapping(index)"
+                  class="rounded-lg p-2 text-red-500 transition-colors hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-900/20"
+                >
+                  <svg class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                    <path
+                      stroke-linecap="round"
+                      stroke-linejoin="round"
+                      stroke-width="2"
+                      d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
+                    />
+                  </svg>
+                </button>
+              </div>
+            </div>
+
+            <button
+              type="button"
+              @click="addModelMapping"
+              class="mb-3 w-full rounded-lg border-2 border-dashed border-gray-300 px-4 py-2 text-gray-600 transition-colors hover:border-gray-400 hover:text-gray-700 dark:border-dark-500 dark:text-gray-400 dark:hover:border-dark-400 dark:hover:text-gray-300"
+            >
+              <svg
+                class="mr-1 inline h-4 w-4"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+              >
+                <path
+                  stroke-linecap="round"
+                  stroke-linejoin="round"
+                  stroke-width="2"
+                  d="M12 4v16m8-8H4"
+                />
+              </svg>
+              {{ t('admin.accounts.addMapping') }}
+            </button>
+
+            <!-- Quick Add Buttons -->
+            <div class="flex flex-wrap gap-2">
+              <button
+                v-for="preset in presetMappings"
+                :key="preset.label"
+                type="button"
+                @click="addPresetMapping(preset.from, preset.to)"
+                :class="['rounded-lg px-3 py-1 text-xs transition-colors', preset.color]"
+              >
+                + {{ preset.label }}
+              </button>
+            </div>
           </div>
         </div>
       </div>
@@ -1959,6 +2134,7 @@ import QuotaLimitCard from '@/components/account/QuotaLimitCard.vue'
 import { applyInterceptWarmup } from '@/components/account/credentialsBuilder'
 import { formatDateTime, formatDateTimeLocalInput, parseDateTimeLocalInput } from '@/utils/format'
 import { createStableObjectKeyResolver } from '@/utils/stableObjectKey'
+import { VERTEX_LOCATION_OPTIONS } from '@/constants/account'
 import {
   OPENAI_WS_MODE_CTX_POOL,
   OPENAI_WS_MODE_OFF,
@@ -2030,52 +2206,6 @@ const editBedrockApiKeyValue = ref('')
 const editVertexProjectId = ref('')
 const editVertexClientEmail = ref('')
 const editVertexLocation = ref('us-central1')
-const vertexLocationOptions = [
-  {
-    label: 'Common',
-    options: [
-      { value: 'us-central1', label: 'us-central1 (Iowa)' },
-      { value: 'global', label: 'global' },
-      { value: 'us', label: 'us' },
-      { value: 'eu', label: 'eu' }
-    ]
-  },
-  {
-    label: 'United States',
-    options: [
-      { value: 'us-east1', label: 'us-east1 (South Carolina)' },
-      { value: 'us-east4', label: 'us-east4 (Northern Virginia)' },
-      { value: 'us-east5', label: 'us-east5 (Columbus)' },
-      { value: 'us-south1', label: 'us-south1 (Dallas)' },
-      { value: 'us-west1', label: 'us-west1 (Oregon)' },
-      { value: 'us-west4', label: 'us-west4 (Las Vegas)' }
-    ]
-  },
-  {
-    label: 'Europe',
-    options: [
-      { value: 'europe-west1', label: 'europe-west1 (Belgium)' },
-      { value: 'europe-west2', label: 'europe-west2 (London)' },
-      { value: 'europe-west3', label: 'europe-west3 (Frankfurt)' },
-      { value: 'europe-west4', label: 'europe-west4 (Netherlands)' },
-      { value: 'europe-west6', label: 'europe-west6 (Zurich)' },
-      { value: 'europe-west8', label: 'europe-west8 (Milan)' },
-      { value: 'europe-west9', label: 'europe-west9 (Paris)' }
-    ]
-  },
-  {
-    label: 'Asia Pacific',
-    options: [
-      { value: 'asia-east1', label: 'asia-east1 (Taiwan)' },
-      { value: 'asia-east2', label: 'asia-east2 (Hong Kong)' },
-      { value: 'asia-northeast1', label: 'asia-northeast1 (Tokyo)' },
-      { value: 'asia-northeast3', label: 'asia-northeast3 (Seoul)' },
-      { value: 'asia-south1', label: 'asia-south1 (Mumbai)' },
-      { value: 'asia-southeast1', label: 'asia-southeast1 (Singapore)' },
-      { value: 'australia-southeast1', label: 'australia-southeast1 (Sydney)' }
-    ]
-  }
-] as const
 const isBedrockAPIKeyMode = computed(() =>
   props.account?.type === 'bedrock' &&
   (props.account?.credentials as Record<string, unknown>)?.auth_mode === 'apikey'
@@ -2564,6 +2694,26 @@ const syncFormFromAccount = (newAccount: Account | null) => {
     editVertexProjectId.value = (credentials.project_id as string) || ''
     editVertexClientEmail.value = (credentials.client_email as string) || ''
     editVertexLocation.value = (credentials.location as string) || (credentials.vertex_location as string) || 'us-central1'
+
+    // Load model mappings for service_account
+    const existingMappings = credentials.model_mapping as Record<string, string> | undefined
+    if (existingMappings && typeof existingMappings === 'object') {
+      const entries = Object.entries(existingMappings)
+      const isWhitelistMode = entries.length > 0 && entries.every(([from, to]) => from === to)
+      if (isWhitelistMode) {
+        modelRestrictionMode.value = 'whitelist'
+        allowedModels.value = entries.map(([from]) => from)
+        modelMappings.value = []
+      } else {
+        modelRestrictionMode.value = 'mapping'
+        modelMappings.value = entries.map(([from, to]) => ({ from, to }))
+        allowedModels.value = []
+      }
+    } else {
+      modelRestrictionMode.value = 'whitelist'
+      modelMappings.value = []
+      allowedModels.value = []
+    }
   } else {
     const platformDefaultUrl =
       newAccount.platform === 'openai'
@@ -3160,20 +3310,20 @@ const handleSubmit = async () => {
       const newCredentials: Record<string, unknown> = { ...currentCredentials }
 
       if (!editVertexProjectId.value.trim()) {
-        appStore.showError('Service Account JSON 缺少 project_id')
+        appStore.showError(t('admin.accounts.vertexSaJsonMissingProjectId'))
         return
       }
       if (!editVertexClientEmail.value.trim()) {
-        appStore.showError('Service Account JSON 缺少 client_email')
+        appStore.showError(t('admin.accounts.vertexSaJsonMissingClientEmail'))
         return
       }
       if (!editVertexLocation.value.trim()) {
-        appStore.showError('请填写 Vertex location')
+        appStore.showError(t('admin.accounts.vertexLocationRequired'))
         return
       }
 
       if (!currentCredentials.service_account_json && !currentCredentials.service_account) {
-        appStore.showError('请上传 Service Account JSON')
+        appStore.showError(t('admin.accounts.vertexSaJsonRequired'))
         return
       }
       newCredentials.project_id = editVertexProjectId.value.trim()
@@ -3181,6 +3331,14 @@ const handleSubmit = async () => {
       newCredentials.location = editVertexLocation.value.trim()
       newCredentials.tier_id = 'vertex'
 
+      // Add model mapping if configured
+      const modelMapping = buildModelMappingObject(modelRestrictionMode.value, allowedModels.value, modelMappings.value)
+      if (modelMapping) {
+        newCredentials.model_mapping = modelMapping
+      } else {
+        delete newCredentials.model_mapping
+      }
+
       applyInterceptWarmup(newCredentials, interceptWarmupRequests.value, 'edit')
       if (!applyTempUnschedConfig(newCredentials)) {
         return
diff --git a/frontend/src/constants/account.ts b/frontend/src/constants/account.ts
index dcfc7fae..776de4fa 100644
--- a/frontend/src/constants/account.ts
+++ b/frontend/src/constants/account.ts
@@ -13,3 +13,51 @@ export type QuotaThresholdType = typeof QUOTA_THRESHOLD_TYPE_FIXED | typeof QUOT
 export const QUOTA_RESET_MODE_ROLLING = 'rolling' as const
 export const QUOTA_RESET_MODE_FIXED = 'fixed' as const
 export type QuotaResetMode = typeof QUOTA_RESET_MODE_ROLLING | typeof QUOTA_RESET_MODE_FIXED
+
+/** Vertex AI location options for Service Account accounts */
+export const VERTEX_LOCATION_OPTIONS = [
+  {
+    label: 'Common',
+    options: [
+      { value: 'us-central1', label: 'us-central1 (Iowa)' },
+      { value: 'global', label: 'global' },
+      { value: 'us', label: 'us' },
+      { value: 'eu', label: 'eu' }
+    ]
+  },
+  {
+    label: 'United States',
+    options: [
+      { value: 'us-east1', label: 'us-east1 (South Carolina)' },
+      { value: 'us-east4', label: 'us-east4 (Northern Virginia)' },
+      { value: 'us-east5', label: 'us-east5 (Columbus)' },
+      { value: 'us-south1', label: 'us-south1 (Dallas)' },
+      { value: 'us-west1', label: 'us-west1 (Oregon)' },
+      { value: 'us-west4', label: 'us-west4 (Las Vegas)' }
+    ]
+  },
+  {
+    label: 'Europe',
+    options: [
+      { value: 'europe-west1', label: 'europe-west1 (Belgium)' },
+      { value: 'europe-west2', label: 'europe-west2 (London)' },
+      { value: 'europe-west3', label: 'europe-west3 (Frankfurt)' },
+      { value: 'europe-west4', label: 'europe-west4 (Netherlands)' },
+      { value: 'europe-west6', label: 'europe-west6 (Zurich)' },
+      { value: 'europe-west8', label: 'europe-west8 (Milan)' },
+      { value: 'europe-west9', label: 'europe-west9 (Paris)' }
+    ]
+  },
+  {
+    label: 'Asia Pacific',
+    options: [
+      { value: 'asia-east1', label: 'asia-east1 (Taiwan)' },
+      { value: 'asia-east2', label: 'asia-east2 (Hong Kong)' },
+      { value: 'asia-northeast1', label: 'asia-northeast1 (Tokyo)' },
+      { value: 'asia-northeast3', label: 'asia-northeast3 (Seoul)' },
+      { value: 'asia-south1', label: 'asia-south1 (Mumbai)' },
+      { value: 'asia-southeast1', label: 'asia-southeast1 (Singapore)' },
+      { value: 'australia-southeast1', label: 'australia-southeast1 (Sydney)' }
+    ]
+  }
+] as const
diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index 270cd660..0425955f 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -2815,6 +2815,26 @@ export default {
       claudeConsole: 'Claude Console',
       bedrockLabel: 'AWS Bedrock',
       bedrockDesc: 'SigV4 / API Key',
+      vertexLabel: 'Vertex',
+      vertexDesc: 'Service Account',
+      vertexAnthropicHint: 'Use a Google Cloud Service Account JSON to call Anthropic Claude via Vertex AI. It is recommended to configure model mapping to map client Claude model names to Vertex model IDs.',
+      vertexGeminiHint: 'Use a Google Cloud Service Account JSON to access Vertex AI Gemini. It is recommended to place Vertex accounts in a separate group to avoid mixing with AI Studio/Gemini OAuth on the same models.',
+      vertexSaJsonLabel: 'Service Account JSON',
+      vertexSaJsonLoaded: 'Service Account JSON loaded',
+      vertexSaJsonDrop: 'Drop Service Account JSON here',
+      vertexSaJsonKeyHidden: 'Key content is not displayed in the form.',
+      vertexSaJsonDropHint: 'Drag a .json file here, or click the button to select one.',
+      vertexSaJsonSelectBtn: 'Select JSON',
+      vertexSaJsonUploadHint: 'After uploading or dropping a JSON file, the project_id will be auto-extracted. Key content is only used for account creation.',
+      vertexSaJsonEditHint: 'Service Account JSON is not shown on the edit page; to change the JSON, delete the account and recreate it.',
+      vertexProjectIdPlaceholder: 'Auto-extracted from JSON',
+      vertexLocationHint: 'Available locations vary by Vertex model. Select the default endpoint location for this account.',
+      vertexLocationRequired: 'Please enter a Vertex location',
+      vertexSaJsonMissingFields: 'Service Account JSON is missing project_id, client_email, or private_key',
+      vertexSaJsonMissingProjectId: 'Service Account JSON is missing project_id',
+      vertexSaJsonMissingClientEmail: 'Service Account JSON is missing client_email',
+      vertexSaJsonInvalid: 'Service Account JSON format is invalid',
+      vertexSaJsonRequired: 'Please upload a Service Account JSON',
       oauthSetupToken: 'OAuth / Setup Token',
       addMethod: 'Add Method',
       setupTokenLongLived: 'Setup Token (Long-lived)',
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index fdfc9e41..a8656a7b 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -2963,6 +2963,26 @@ export default {
       claudeConsole: 'Claude Console',
       bedrockLabel: 'AWS Bedrock',
       bedrockDesc: 'SigV4 / API Key',
+      vertexLabel: 'Vertex',
+      vertexDesc: 'Service Account',
+      vertexAnthropicHint: '使用 Google Cloud Service Account JSON 通过 Vertex AI 调用 Anthropic Claude。建议配置模型映射，将客户端 Claude 模型名映射到 Vertex 模型 ID。',
+      vertexGeminiHint: '使用 Google Cloud Service Account JSON 访问 Vertex AI Gemini。建议将 Vertex 账号放入独立分组，避免和 AI Studio/Gemini OAuth 同模型混调。',
+      vertexSaJsonLabel: 'Service Account JSON',
+      vertexSaJsonLoaded: '已读取 Service Account JSON',
+      vertexSaJsonDrop: '拖入 Service Account JSON',
+      vertexSaJsonKeyHidden: '密钥内容不会在表单中显示。',
+      vertexSaJsonDropHint: '把 .json 文件拖到这里，或点击按钮选择文件。',
+      vertexSaJsonSelectBtn: '选择 JSON',
+      vertexSaJsonUploadHint: '上传或拖入 JSON 后会自动读取 project_id，密钥内容仅用于创建账号提交。',
+      vertexSaJsonEditHint: 'Service Account JSON 不在编辑页显示；需要更换 JSON 时请删除账号后重新创建。',
+      vertexProjectIdPlaceholder: '从 JSON 自动读取',
+      vertexLocationHint: '不同 Vertex 模型可用 location 可能不同，这里选择账号默认 endpoint location。',
+      vertexLocationRequired: '请填写 Vertex location',
+      vertexSaJsonMissingFields: 'Service Account JSON 缺少 project_id、client_email 或 private_key',
+      vertexSaJsonMissingProjectId: 'Service Account JSON 缺少 project_id',
+      vertexSaJsonMissingClientEmail: 'Service Account JSON 缺少 client_email',
+      vertexSaJsonInvalid: 'Service Account JSON 格式无效',
+      vertexSaJsonRequired: '请上传 Service Account JSON',
       oauthSetupToken: 'OAuth / Setup Token',
       addMethod: '添加方式',
       setupTokenLongLived: 'Setup Token（长期有效）',