diff --git a/src/main/apiServer/utils/__tests__/provider-alias.test.ts b/src/main/apiServer/utils/__tests__/provider-alias.test.ts
new file mode 100644
index 0000000000..d7aad83b23
--- /dev/null
+++ b/src/main/apiServer/utils/__tests__/provider-alias.test.ts
@@ -0,0 +1,118 @@
+import { CacheService } from '@main/services/CacheService'
+import type { Model, Provider } from '@types'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+const { selectMock } = vi.hoisted(() => ({
+  selectMock: vi.fn()
+}))
+
+vi.mock('@main/services/ReduxService', () => ({
+  reduxService: {
+    select: selectMock
+  }
+}))
+
+import { getProviderByModel, transformModelToOpenAI, validateModelId } from '..'
+
+describe('api server provider alias', () => {
+  beforeEach(() => {
+    CacheService.clear()
+    selectMock.mockReset()
+  })
+
+  it('formats model id using provider apiIdentifier when present', () => {
+    const provider: Provider = {
+      id: 'test-provider-uuid',
+      apiIdentifier: 'short',
+      type: 'openai',
+      name: 'Custom Provider',
+      apiKey: 'test-key',
+      apiHost: 'https://example.com/v1',
+      models: [],
+      enabled: true
+    }
+
+    const model: Model = {
+      id: 'glm-4.6',
+      provider: provider.id,
+      name: 'glm-4.6',
+      group: 'glm'
+    }
+
+    const apiModel = transformModelToOpenAI(model, provider)
+    expect(apiModel.id).toBe('short:glm-4.6')
+    expect(apiModel.provider).toBe('test-provider-uuid')
+  })
+
+  it('resolves provider by apiIdentifier for model routing', async () => {
+    const provider: Provider = {
+      id: 'test-provider-uuid',
+      apiIdentifier: 'short',
+      type: 'openai',
+      name: 'Custom Provider',
+      apiKey: 'test-key',
+      apiHost: 'https://example.com/v1',
+      models: [],
+      enabled: true
+    }
+
+    selectMock.mockResolvedValue([provider])
+
+    const resolved = await getProviderByModel('short:glm-4.6')
+    expect(resolved?.id).toBe('test-provider-uuid')
+  })
+
+  it('validates model ids with apiIdentifier prefix', async () => {
+    const provider: Provider = {
+      id: 'test-provider-uuid',
+      apiIdentifier: 'short',
+      type: 'openai',
+      name: 'Custom Provider',
+      apiKey: 'test-key',
+      apiHost: 'https://example.com/v1',
+      models: [
+        {
+          id: 'glm-4.6',
+          provider: 'test-provider-uuid',
+          name: 'glm-4.6',
+          group: 'glm'
+        }
+      ],
+      enabled: true
+    }
+
+    selectMock.mockResolvedValue([provider])
+
+    const result = await validateModelId('short:glm-4.6')
+    expect(result.valid).toBe(true)
+    expect(result.provider?.id).toBe('test-provider-uuid')
+    expect(result.modelId).toBe('glm-4.6')
+  })
+
+  it('still supports provider.id prefix', async () => {
+    const provider: Provider = {
+      id: 'test-provider-uuid',
+      apiIdentifier: 'short',
+      type: 'openai',
+      name: 'Custom Provider',
+      apiKey: 'test-key',
+      apiHost: 'https://example.com/v1',
+      models: [
+        {
+          id: 'glm-4.6',
+          provider: 'test-provider-uuid',
+          name: 'glm-4.6',
+          group: 'glm'
+        }
+      ],
+      enabled: true
+    }
+
+    selectMock.mockResolvedValue([provider])
+
+    const result = await validateModelId('test-provider-uuid:glm-4.6')
+    expect(result.valid).toBe(true)
+    expect(result.provider?.id).toBe('test-provider-uuid')
+    expect(result.modelId).toBe('glm-4.6')
+  })
+})
diff --git a/src/main/apiServer/utils/index.ts b/src/main/apiServer/utils/index.ts
index e25b49e750..072d9ecf54 100644
--- a/src/main/apiServer/utils/index.ts
+++ b/src/main/apiServer/utils/index.ts
@@ -82,16 +82,24 @@ export async function getProviderByModel(model: string): Promise<Provider | unde
     }
 
     const providerId = modelInfo[0]
-    const provider = providers.find((p: Provider) => p.id === providerId)
+    const matchingProviders = providers.filter((p: Provider) => p.id === providerId || p.apiIdentifier === providerId)
+    const provider = matchingProviders.find((p) => p.id === providerId) ?? matchingProviders[0]
 
     if (!provider) {
       logger.warn('Provider not found for model', {
         providerId,
-        available: providers.map((p) => p.id)
+        available: providers.map((p) => ({ id: p.id, apiIdentifier: p.apiIdentifier }))
       })
       return undefined
     }
 
+    if (matchingProviders.length > 1) {
+      logger.warn('Multiple providers matched for model prefix', {
+        providerId,
+        matches: matchingProviders.map((p) => ({ id: p.id, apiIdentifier: p.apiIdentifier }))
+      })
+    }
+
     logger.debug('Provider resolved for model', { providerId, model })
     return provider
   } catch (error: any) {
@@ -200,8 +208,9 @@ export async function validateModelId(model: string): Promise<{
 
 export function transformModelToOpenAI(model: Model, provider?: Provider): ApiModel {
   const providerDisplayName = provider?.name
+  const providerModelPrefix = provider?.apiIdentifier?.trim() || provider?.id || model.provider
   return {
-    id: `${model.provider}:${model.id}`,
+    id: `${providerModelPrefix}:${model.id}`,
     object: 'model',
     name: model.name,
     created: Math.floor(Date.now() / 1000),
diff --git a/src/renderer/src/i18n/locales/en-us.json b/src/renderer/src/i18n/locales/en-us.json
index f4012363e3..25dd0b4b44 100644
--- a/src/renderer/src/i18n/locales/en-us.json
+++ b/src/renderer/src/i18n/locales/en-us.json
@@ -4469,6 +4469,16 @@
       "api_host_no_valid": "API address is invalid",
       "api_host_preview": "Preview: {{url}}",
       "api_host_tooltip": "Override only when your provider requires a custom OpenAI-compatible endpoint.",
+      "api_identifier": {
+        "error": {
+          "duplicate": "Identifier is already used by another provider",
+          "invalid": "Only letters, numbers, '-' and '_' are allowed, and ':' is not allowed"
+        },
+        "label": "API Identifier",
+        "placeholder": "Example: my-provider",
+        "preview": "Example: {{model}}",
+        "tip": "Used as the model prefix in API relay. Leave empty to use the internal UUID."
+      },
       "api_key": {
         "label": "API Key",
         "tip": "Use commas to separate multiple keys"
diff --git a/src/renderer/src/i18n/locales/zh-cn.json b/src/renderer/src/i18n/locales/zh-cn.json
index 0e5b2f60e7..a1dbfefc78 100644
--- a/src/renderer/src/i18n/locales/zh-cn.json
+++ b/src/renderer/src/i18n/locales/zh-cn.json
@@ -4469,6 +4469,16 @@
       "api_host_no_valid": "API 地址不合法",
       "api_host_preview": "预览：{{url}}",
       "api_host_tooltip": "仅在服务商需要自定义的 OpenAI 兼容地址时覆盖。",
+      "api_identifier": {
+        "error": {
+          "duplicate": "该标识符已被其他提供商使用",
+          "invalid": "仅支持字母、数字、“-”、“_”，且不能包含“:”"
+        },
+        "label": "API 标识符",
+        "placeholder": "例如：my-provider",
+        "preview": "示例：{{model}}",
+        "tip": "用于 API Relay 的模型前缀。留空则使用内部 UUID。"
+      },
       "api_key": {
         "label": "API 密钥",
         "tip": "多个密钥使用逗号分隔"
diff --git a/src/renderer/src/i18n/locales/zh-tw.json b/src/renderer/src/i18n/locales/zh-tw.json
index 9625c68386..301077da62 100644
--- a/src/renderer/src/i18n/locales/zh-tw.json
+++ b/src/renderer/src/i18n/locales/zh-tw.json
@@ -4469,6 +4469,16 @@
       "api_host_no_valid": "API 位址不合法",
       "api_host_preview": "預覽：{{url}}",
       "api_host_tooltip": "僅在供應商需要自訂的 OpenAI 相容端點時才覆蓋。",
+      "api_identifier": {
+        "error": {
+          "duplicate": "此識別碼已被其他供應商使用",
+          "invalid": "僅支援字母、數字、“-”、“_”，且不能包含“:”"
+        },
+        "label": "API 識別碼",
+        "placeholder": "例如：my-provider",
+        "preview": "範例：{{model}}",
+        "tip": "用於 API Relay 的模型前綴。留空則使用內部 UUID。"
+      },
       "api_key": {
         "label": "API 金鑰",
         "tip": "多個金鑰使用逗號分隔"
diff --git a/src/renderer/src/pages/settings/ProviderSettings/ProviderSetting.tsx b/src/renderer/src/pages/settings/ProviderSettings/ProviderSetting.tsx
index 049c14c0d1..981297cd7d 100644
--- a/src/renderer/src/pages/settings/ProviderSettings/ProviderSetting.tsx
+++ b/src/renderer/src/pages/settings/ProviderSettings/ProviderSetting.tsx
@@ -92,6 +92,8 @@ const isAnthropicCompatibleProviderId = (id: string): id is AnthropicCompatibleP
 
 type HostField = 'apiHost' | 'anthropicApiHost'
 
+const API_IDENTIFIER_PATTERN = /^[a-zA-Z0-9][a-zA-Z0-9_-]{0,31}$/
+
 const ProviderSetting: FC<Props> = ({ providerId }) => {
   const { provider, updateProvider, models } = useProvider(providerId)
   const allProviders = useAllProviders()
@@ -122,6 +124,7 @@ const ProviderSetting: FC<Props> = ({ providerId }) => {
   const fancyProviderName = getFancyProviderName(provider)
 
   const [localApiKey, setLocalApiKey] = useState(provider.apiKey)
+  const [apiIdentifier, setApiIdentifier] = useState(provider.apiIdentifier ?? '')
   const [apiKeyConnectivity, setApiKeyConnectivity] = useState<ApiKeyConnectivity>({
     status: HealthStatus.NOT_CHECKED,
     checking: false
@@ -147,6 +150,10 @@ const ProviderSetting: FC<Props> = ({ providerId }) => {
     setApiKeyConnectivity({ status: HealthStatus.NOT_CHECKED })
   }, [provider.apiKey])
 
+  useEffect(() => {
+    setApiIdentifier(provider.apiIdentifier ?? '')
+  }, [provider.apiIdentifier])
+
   // 同步 localApiKey 到 provider.apiKey（防抖）
   useEffect(() => {
     if (localApiKey !== provider.apiKey) {
@@ -385,6 +392,41 @@ const ProviderSetting: FC<Props> = ({ providerId }) => {
 
   const isAnthropicOAuth = () => provider.id === 'anthropic' && provider.authType === 'oauth'
 
+  const onUpdateApiIdentifier = useCallback(() => {
+    const normalizedIdentifier = apiIdentifier.trim()
+
+    if (!normalizedIdentifier) {
+      updateProvider({ apiIdentifier: undefined })
+      setApiIdentifier('')
+      return
+    }
+
+    if (!API_IDENTIFIER_PATTERN.test(normalizedIdentifier) || normalizedIdentifier.includes(':')) {
+      window.toast.error(t('settings.provider.api_identifier.error.invalid'))
+      setApiIdentifier(provider.apiIdentifier ?? '')
+      return
+    }
+
+    const conflictProvider = allProviders.find((p) => {
+      if (p.id === provider.id) {
+        return false
+      }
+      if (p.id === normalizedIdentifier) {
+        return true
+      }
+      return p.apiIdentifier?.trim() === normalizedIdentifier
+    })
+
+    if (conflictProvider) {
+      window.toast.error(t('settings.provider.api_identifier.error.duplicate'))
+      setApiIdentifier(provider.apiIdentifier ?? '')
+      return
+    }
+
+    updateProvider({ apiIdentifier: normalizedIdentifier })
+    setApiIdentifier(normalizedIdentifier)
+  }, [allProviders, apiIdentifier, provider.apiIdentifier, provider.id, t, updateProvider])
+
   return (
     <SettingContainer theme={theme} style={{ background: 'var(--color-background)' }}>
       <SettingTitle>
@@ -418,6 +460,34 @@ const ProviderSetting: FC<Props> = ({ providerId }) => {
         />
       </SettingTitle>
       <Divider style={{ width: '100%', margin: '10px 0' }} />
+      {!isSystemProvider(provider) && (
+        <>
+          <SettingSubtitle style={{ marginTop: 5, display: 'flex', alignItems: 'center', gap: 6 }}>
+            {t('settings.provider.api_identifier.label')}
+            <HelpTooltip title={t('settings.provider.api_identifier.tip')}></HelpTooltip>
+          </SettingSubtitle>
+          <Input
+            value={apiIdentifier}
+            placeholder={t('settings.provider.api_identifier.placeholder')}
+            onChange={(e) => setApiIdentifier(e.target.value)}
+            onBlur={onUpdateApiIdentifier}
+            onKeyDown={(e) => {
+              if (e.key === 'Enter' && !e.nativeEvent.isComposing) {
+                onUpdateApiIdentifier()
+              }
+            }}
+            spellCheck={false}
+            maxLength={32}
+          />
+          <SettingHelpTextRow style={{ justifyContent: 'space-between' }}>
+            <SettingHelpText>
+              {t('settings.provider.api_identifier.preview', {
+                model: `${apiIdentifier.trim() || provider.id}:glm-4.6`
+              })}
+            </SettingHelpText>
+          </SettingHelpTextRow>
+        </>
+      )}
       {isProviderSupportAuth(provider) && <ProviderOAuth providerId={provider.id} />}
       {provider.id === 'openai' && <OpenAIAlert />}
       {provider.id === 'ovms' && <OVMSSettings />}
diff --git a/src/renderer/src/types/provider.ts b/src/renderer/src/types/provider.ts
index edab3a7305..313e0eb7a2 100644
--- a/src/renderer/src/types/provider.ts
+++ b/src/renderer/src/types/provider.ts
@@ -98,6 +98,11 @@ export type Provider = {
   id: string
   type: ProviderType
   name: string
+  /**
+   * Optional short identifier used by the built-in API relay.
+   * When set, models can be referenced as `${apiIdentifier}:${modelId}` instead of `${id}:${modelId}`.
+   */
+  apiIdentifier?: string
   apiKey: string
   apiHost: string
   anthropicApiHost?: string