diff --git a/frontend/src/components/keys/UseKeyModal.vue b/frontend/src/components/keys/UseKeyModal.vue
index 4c45550c..78ea51a3 100644
--- a/frontend/src/components/keys/UseKeyModal.vue
+++ b/frontend/src/components/keys/UseKeyModal.vue
@@ -6,69 +6,100 @@
     @close="emit('close')"
   >
     <div class="space-y-4">
-      <!-- Description -->
-      <p class="text-sm text-gray-600 dark:text-gray-400">
-        {{ t('keys.useKeyModal.description') }}
-      </p>
-
-      <!-- OS Tabs -->
-      <div class="border-b border-gray-200 dark:border-dark-700">
-        <nav class="-mb-px flex space-x-4" aria-label="Tabs">
-          <button
-            v-for="tab in tabs"
-            :key="tab.id"
-            @click="activeTab = tab.id"
-            :class="[
-              'whitespace-nowrap py-2.5 px-1 border-b-2 font-medium text-sm transition-colors',
-              activeTab === tab.id
-                ? 'border-primary-500 text-primary-600 dark:text-primary-400'
-                : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300 dark:text-gray-400 dark:hover:text-gray-300'
-            ]"
-          >
-            <span class="flex items-center gap-2">
-              <component :is="tab.icon" class="w-4 h-4" />
-              {{ tab.label }}
-            </span>
-          </button>
-        </nav>
-      </div>
-
-      <!-- Code Block -->
-      <div class="relative">
-        <div class="bg-gray-900 dark:bg-dark-900 rounded-xl overflow-hidden">
-          <!-- Code Header -->
-          <div class="flex items-center justify-between px-4 py-2 bg-gray-800 dark:bg-dark-800 border-b border-gray-700 dark:border-dark-700">
-            <span class="text-xs text-gray-400 font-mono">{{ activeTabConfig?.filename }}</span>
-            <button
-              @click="copyConfig"
-              class="flex items-center gap-1.5 px-2.5 py-1 text-xs font-medium rounded-lg transition-colors"
-              :class="copied
-                ? 'bg-green-500/20 text-green-400'
-                : 'bg-gray-700 hover:bg-gray-600 text-gray-300 hover:text-white'"
-            >
-              <svg v-if="copied" class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2">
-                <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7" />
-              </svg>
-              <svg v-else class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
-                <path stroke-linecap="round" stroke-linejoin="round" d="M15.666 3.888A2.25 2.25 0 0013.5 2.25h-3c-1.03 0-1.9.693-2.166 1.638m7.332 0c.055.194.084.4.084.612v0a.75.75 0 01-.75.75H9a.75.75 0 01-.75-.75v0c0-.212.03-.418.084-.612m7.332 0c.646.049 1.288.11 1.927.184 1.1.128 1.907 1.077 1.907 2.185V19.5a2.25 2.25 0 01-2.25 2.25H6.75A2.25 2.25 0 014.5 19.5V6.257c0-1.108.806-2.057 1.907-2.185a48.208 48.208 0 011.927-.184" />
-              </svg>
-              {{ copied ? t('keys.useKeyModal.copied') : t('keys.useKeyModal.copy') }}
-            </button>
-          </div>
-          <!-- Code Content -->
-          <pre class="p-4 text-sm font-mono text-gray-100 overflow-x-auto"><code v-html="highlightedCode"></code></pre>
+      <!-- No Group Assigned Warning -->
+      <div v-if="!platform" class="flex items-start gap-3 p-4 rounded-lg bg-yellow-50 dark:bg-yellow-900/20 border border-yellow-200 dark:border-yellow-800">
+        <svg class="w-5 h-5 text-yellow-500 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
+          <path stroke-linecap="round" stroke-linejoin="round" d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126zM12 15.75h.007v.008H12v-.008z" />
+        </svg>
+        <div>
+          <p class="text-sm font-medium text-yellow-800 dark:text-yellow-200">
+            {{ t('keys.useKeyModal.noGroupTitle') }}
+          </p>
+          <p class="text-sm text-yellow-700 dark:text-yellow-300 mt-1">
+            {{ t('keys.useKeyModal.noGroupDescription') }}
+          </p>
         </div>
       </div>
 
-      <!-- Usage Note -->
-      <div class="flex items-start gap-3 p-3 rounded-lg bg-blue-50 dark:bg-blue-900/20 border border-blue-100 dark:border-blue-800">
-        <svg class="w-5 h-5 text-blue-500 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
-          <path stroke-linecap="round" stroke-linejoin="round" d="M11.25 11.25l.041-.02a.75.75 0 011.063.852l-.708 2.836a.75.75 0 001.063.853l.041-.021M21 12a9 9 0 11-18 0 9 9 0 0118 0zm-9-3.75h.008v.008H12V8.25z" />
-        </svg>
-        <p class="text-sm text-blue-700 dark:text-blue-300">
-          {{ t('keys.useKeyModal.note') }}
+      <!-- Platform-specific content -->
+      <template v-else>
+        <!-- Description -->
+        <p class="text-sm text-gray-600 dark:text-gray-400">
+          {{ platformDescription }}
         </p>
-      </div>
+
+        <!-- OS Tabs -->
+        <div class="border-b border-gray-200 dark:border-dark-700">
+          <nav class="-mb-px flex space-x-4" aria-label="Tabs">
+            <button
+              v-for="tab in currentTabs"
+              :key="tab.id"
+              @click="activeTab = tab.id"
+              :class="[
+                'whitespace-nowrap py-2.5 px-1 border-b-2 font-medium text-sm transition-colors',
+                activeTab === tab.id
+                  ? 'border-primary-500 text-primary-600 dark:text-primary-400'
+                  : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300 dark:text-gray-400 dark:hover:text-gray-300'
+              ]"
+            >
+              <span class="flex items-center gap-2">
+                <component :is="tab.icon" class="w-4 h-4" />
+                {{ tab.label }}
+              </span>
+            </button>
+          </nav>
+        </div>
+
+        <!-- Code Blocks (Stacked for multi-file platforms) -->
+        <div class="space-y-4">
+          <div
+            v-for="(file, index) in currentFiles"
+            :key="index"
+            class="relative"
+          >
+            <!-- File Hint (if exists) -->
+            <p v-if="file.hint" class="text-xs text-amber-600 dark:text-amber-400 mb-1.5 flex items-center gap-1">
+              <svg class="w-3.5 h-3.5 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M12 9v3.75m9-.75a9 9 0 11-18 0 9 9 0 0118 0zm-9 3.75h.008v.008H12v-.008z" />
+              </svg>
+              {{ file.hint }}
+            </p>
+            <div class="bg-gray-900 dark:bg-dark-900 rounded-xl overflow-hidden">
+              <!-- Code Header -->
+              <div class="flex items-center justify-between px-4 py-2 bg-gray-800 dark:bg-dark-800 border-b border-gray-700 dark:border-dark-700">
+                <span class="text-xs text-gray-400 font-mono">{{ file.path }}</span>
+                <button
+                  @click="copyContent(file.content, index)"
+                  class="flex items-center gap-1.5 px-2.5 py-1 text-xs font-medium rounded-lg transition-colors"
+                  :class="copiedIndex === index
+                    ? 'bg-green-500/20 text-green-400'
+                    : 'bg-gray-700 hover:bg-gray-600 text-gray-300 hover:text-white'"
+                >
+                  <svg v-if="copiedIndex === index" class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2">
+                    <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7" />
+                  </svg>
+                  <svg v-else class="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
+                    <path stroke-linecap="round" stroke-linejoin="round" d="M15.666 3.888A2.25 2.25 0 0013.5 2.25h-3c-1.03 0-1.9.693-2.166 1.638m7.332 0c.055.194.084.4.084.612v0a.75.75 0 01-.75.75H9a.75.75 0 01-.75-.75v0c0-.212.03-.418.084-.612m7.332 0c.646.049 1.288.11 1.927.184 1.1.128 1.907 1.077 1.907 2.185V19.5a2.25 2.25 0 01-2.25 2.25H6.75A2.25 2.25 0 014.5 19.5V6.257c0-1.108.806-2.057 1.907-2.185a48.208 48.208 0 011.927-.184" />
+                  </svg>
+                  {{ copiedIndex === index ? t('keys.useKeyModal.copied') : t('keys.useKeyModal.copy') }}
+                </button>
+              </div>
+              <!-- Code Content -->
+              <pre class="p-4 text-sm font-mono text-gray-100 overflow-x-auto"><code v-html="file.highlighted"></code></pre>
+            </div>
+          </div>
+        </div>
+
+        <!-- Usage Note -->
+        <div class="flex items-start gap-3 p-3 rounded-lg bg-blue-50 dark:bg-blue-900/20 border border-blue-100 dark:border-blue-800">
+          <svg class="w-5 h-5 text-blue-500 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="1.5">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M11.25 11.25l.041-.02a.75.75 0 011.063.852l-.708 2.836a.75.75 0 001.063.853l.041-.021M21 12a9 9 0 11-18 0 9 9 0 0118 0zm-9-3.75h.008v.008H12V8.25z" />
+          </svg>
+          <p class="text-sm text-blue-700 dark:text-blue-300">
+            {{ platformNote }}
+          </p>
+        </div>
+      </template>
     </div>
 
     <template #footer>
@@ -85,29 +116,53 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, h } from 'vue'
+import { ref, computed, h, watch, type Component } from 'vue'
 import { useI18n } from 'vue-i18n'
 import Modal from '@/components/common/Modal.vue'
 import { useAppStore } from '@/stores/app'
+import type { GroupPlatform } from '@/types'
 
 interface Props {
   show: boolean
   apiKey: string
   baseUrl: string
+  platform: GroupPlatform | null
 }
 
 interface Emits {
   (e: 'close'): void
 }
 
+interface TabConfig {
+  id: string
+  label: string
+  icon: Component
+}
+
+interface FileConfig {
+  path: string
+  content: string
+  highlighted: string
+  hint?: string  // Optional hint message for this file
+}
+
 const props = defineProps<Props>()
 const emit = defineEmits<Emits>()
 
 const { t } = useI18n()
 const appStore = useAppStore()
 
-const copied = ref(false)
-const activeTab = ref<'unix' | 'cmd' | 'powershell'>('unix')
+const copiedIndex = ref<number | null>(null)
+const activeTab = ref<string>('unix')
+
+// Reset active tab when platform changes
+watch(() => props.platform, (newPlatform) => {
+  if (newPlatform === 'openai') {
+    activeTab.value = 'unix'
+  } else {
+    activeTab.value = 'unix'
+  }
+})
 
 // Icon components
 const AppleIcon = {
@@ -134,64 +189,162 @@ const WindowsIcon = {
   }
 }
 
-const tabs = [
-  { id: 'unix' as const, label: 'macOS / Linux', icon: AppleIcon, filename: 'Terminal' },
-  { id: 'cmd' as const, label: 'Windows CMD', icon: WindowsIcon, filename: 'Command Prompt' },
-  { id: 'powershell' as const, label: 'PowerShell', icon: WindowsIcon, filename: 'PowerShell' }
+// Anthropic tabs (3 shell types)
+const anthropicTabs: TabConfig[] = [
+  { id: 'unix', label: 'macOS / Linux', icon: AppleIcon },
+  { id: 'cmd', label: 'Windows CMD', icon: WindowsIcon },
+  { id: 'powershell', label: 'PowerShell', icon: WindowsIcon }
 ]
 
-const activeTabConfig = computed(() => tabs.find(tab => tab.id === activeTab.value))
+// OpenAI tabs (2 OS types)
+const openaiTabs: TabConfig[] = [
+  { id: 'unix', label: 'macOS / Linux', icon: AppleIcon },
+  { id: 'windows', label: 'Windows', icon: WindowsIcon }
+]
 
-const configCode = computed(() => {
+const currentTabs = computed(() => {
+  if (props.platform === 'openai') {
+    return openaiTabs
+  }
+  return anthropicTabs
+})
+
+const platformDescription = computed(() => {
+  if (props.platform === 'openai') {
+    return t('keys.useKeyModal.openai.description')
+  }
+  return t('keys.useKeyModal.description')
+})
+
+const platformNote = computed(() => {
+  if (props.platform === 'openai') {
+    if (activeTab.value === 'windows') {
+      return t('keys.useKeyModal.openai.noteWindows')
+    }
+    return t('keys.useKeyModal.openai.note')
+  }
+  return t('keys.useKeyModal.note')
+})
+
+// Syntax highlighting helpers
+const keyword = (text: string) => `<span class="text-purple-400">${text}</span>`
+const variable = (text: string) => `<span class="text-cyan-400">${text}</span>`
+const string = (text: string) => `<span class="text-green-400">${text}</span>`
+const operator = (text: string) => `<span class="text-yellow-400">${text}</span>`
+const comment = (text: string) => `<span class="text-gray-500">${text}</span>`
+const key = (text: string) => `<span class="text-blue-400">${text}</span>`
+
+// Generate file configs based on platform and active tab
+const currentFiles = computed((): FileConfig[] => {
   const baseUrl = props.baseUrl || window.location.origin
   const apiKey = props.apiKey
 
+  if (props.platform === 'openai') {
+    return generateOpenAIFiles(baseUrl, apiKey)
+  }
+
+  return generateAnthropicFiles(baseUrl, apiKey)
+})
+
+function generateAnthropicFiles(baseUrl: string, apiKey: string): FileConfig[] {
+  let path: string
+  let content: string
+  let highlighted: string
+
   switch (activeTab.value) {
     case 'unix':
-      return `export ANTHROPIC_BASE_URL="${baseUrl}"
+      path = 'Terminal'
+      content = `export ANTHROPIC_BASE_URL="${baseUrl}"
 export ANTHROPIC_AUTH_TOKEN="${apiKey}"`
-    case 'cmd':
-      return `set ANTHROPIC_BASE_URL=${baseUrl}
-set ANTHROPIC_AUTH_TOKEN=${apiKey}`
-    case 'powershell':
-      return `$env:ANTHROPIC_BASE_URL="${baseUrl}"
-$env:ANTHROPIC_AUTH_TOKEN="${apiKey}"`
-    default:
-      return ''
-  }
-})
-
-const highlightedCode = computed(() => {
-  const baseUrl = props.baseUrl || window.location.origin
-  const apiKey = props.apiKey
-
-  // Build highlighted code directly to avoid regex replacement conflicts
-  const keyword = (text: string) => `<span class="text-purple-400">${text}</span>`
-  const variable = (text: string) => `<span class="text-cyan-400">${text}</span>`
-  const string = (text: string) => `<span class="text-green-400">${text}</span>`
-  const operator = (text: string) => `<span class="text-yellow-400">${text}</span>`
-
-  switch (activeTab.value) {
-    case 'unix':
-      return `${keyword('export')} ${variable('ANTHROPIC_BASE_URL')}${operator('=')}${string(`"${baseUrl}"`)}
+      highlighted = `${keyword('export')} ${variable('ANTHROPIC_BASE_URL')}${operator('=')}${string(`"${baseUrl}"`)}
 ${keyword('export')} ${variable('ANTHROPIC_AUTH_TOKEN')}${operator('=')}${string(`"${apiKey}"`)}`
+      break
     case 'cmd':
-      return `${keyword('set')} ${variable('ANTHROPIC_BASE_URL')}${operator('=')}${baseUrl}
+      path = 'Command Prompt'
+      content = `set ANTHROPIC_BASE_URL=${baseUrl}
+set ANTHROPIC_AUTH_TOKEN=${apiKey}`
+      highlighted = `${keyword('set')} ${variable('ANTHROPIC_BASE_URL')}${operator('=')}${baseUrl}
 ${keyword('set')} ${variable('ANTHROPIC_AUTH_TOKEN')}${operator('=')}${apiKey}`
+      break
     case 'powershell':
-      return `${keyword('$env:')}${variable('ANTHROPIC_BASE_URL')}${operator('=')}${string(`"${baseUrl}"`)}
+      path = 'PowerShell'
+      content = `$env:ANTHROPIC_BASE_URL="${baseUrl}"
+$env:ANTHROPIC_AUTH_TOKEN="${apiKey}"`
+      highlighted = `${keyword('$env:')}${variable('ANTHROPIC_BASE_URL')}${operator('=')}${string(`"${baseUrl}"`)}
 ${keyword('$env:')}${variable('ANTHROPIC_AUTH_TOKEN')}${operator('=')}${string(`"${apiKey}"`)}`
+      break
     default:
-      return ''
+      path = 'Terminal'
+      content = ''
+      highlighted = ''
   }
-})
 
-const copyConfig = async () => {
+  return [{ path, content, highlighted }]
+}
+
+function generateOpenAIFiles(baseUrl: string, apiKey: string): FileConfig[] {
+  const isWindows = activeTab.value === 'windows'
+  const configDir = isWindows ? '%userprofile%\\.codex' : '~/.codex'
+
+  // config.toml content
+  const configContent = `model_provider = "sub2api"
+model = "gpt-5.2-codex"
+model_reasoning_effort = "high"
+network_access = "enabled"
+disable_response_storage = true
+windows_wsl_setup_acknowledged = true
+model_verbosity = "high"
+
+[model_providers.sub2api]
+name = "sub2api"
+base_url = "${baseUrl}"
+wire_api = "responses"
+requires_openai_auth = true`
+
+  const configHighlighted = `${key('model_provider')} ${operator('=')} ${string('"sub2api"')}
+${key('model')} ${operator('=')} ${string('"gpt-5.2-codex"')}
+${key('model_reasoning_effort')} ${operator('=')} ${string('"high"')}
+${key('network_access')} ${operator('=')} ${string('"enabled"')}
+${key('disable_response_storage')} ${operator('=')} ${keyword('true')}
+${key('windows_wsl_setup_acknowledged')} ${operator('=')} ${keyword('true')}
+${key('model_verbosity')} ${operator('=')} ${string('"high"')}
+
+${comment('[model_providers.sub2api]')}
+${key('name')} ${operator('=')} ${string('"sub2api"')}
+${key('base_url')} ${operator('=')} ${string(`"${baseUrl}"`)}
+${key('wire_api')} ${operator('=')} ${string('"responses"')}
+${key('requires_openai_auth')} ${operator('=')} ${keyword('true')}`
+
+  // auth.json content
+  const authContent = `{
+  "OPENAI_API_KEY": "${apiKey}"
+}`
+
+  const authHighlighted = `{
+  ${key('"OPENAI_API_KEY"')}: ${string(`"${apiKey}"`)}
+}`
+
+  return [
+    {
+      path: `${configDir}/config.toml`,
+      content: configContent,
+      highlighted: configHighlighted,
+      hint: t('keys.useKeyModal.openai.configTomlHint')
+    },
+    {
+      path: `${configDir}/auth.json`,
+      content: authContent,
+      highlighted: authHighlighted
+    }
+  ]
+}
+
+const copyContent = async (content: string, index: number) => {
   try {
-    await navigator.clipboard.writeText(configCode.value)
-    copied.value = true
+    await navigator.clipboard.writeText(content)
+    copiedIndex.value = index
     setTimeout(() => {
-      copied.value = false
+      copiedIndex.value = null
     }, 2000)
   } catch (error) {
     appStore.showError(t('common.copyFailed'))
diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index 1e982fe2..27fcec8c 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -243,6 +243,14 @@ export default {
       copy: 'Copy',
       copied: 'Copied',
       note: 'These environment variables will be active in the current terminal session. For permanent configuration, add them to ~/.bashrc, ~/.zshrc, or the appropriate configuration file.',
+      noGroupTitle: 'Please assign a group first',
+      noGroupDescription: 'This API key has not been assigned to a group. Please click the group column in the key list to assign one before viewing the configuration.',
+      openai: {
+        description: 'Add the following configuration files to your Codex CLI config directory.',
+        configTomlHint: 'Make sure the following content is at the beginning of the config.toml file',
+        note: 'Make sure the config directory exists. macOS/Linux users can run mkdir -p ~/.codex to create it.',
+        noteWindows: 'Press Win+R and enter %userprofile%\\.codex to open the config directory. Create it manually if it does not exist.',
+      },
     },
     customKeyLabel: 'Custom Key',
     customKeyPlaceholder: 'Enter your custom key (min 16 chars)',
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index 6e6d1759..e3db5ccf 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -239,6 +239,14 @@ export default {
       copy: '复制',
       copied: '已复制',
       note: '这些环境变量将在当前终端会话中生效。如需永久配置，请将其添加到 ~/.bashrc、~/.zshrc 或相应的配置文件中。',
+      noGroupTitle: '请先分配分组',
+      noGroupDescription: '此 API 密钥尚未分配分组，请先在密钥列表中点击分组列进行分配，然后才能查看使用配置。',
+      openai: {
+        description: '将以下配置文件添加到 Codex CLI 配置目录中。',
+        configTomlHint: '请确保以下内容位于 config.toml 文件的开头部分',
+        note: '请确保配置目录存在。macOS/Linux 用户可运行 mkdir -p ~/.codex 创建目录。',
+        noteWindows: '按 Win+R，输入 %userprofile%\\.codex 打开配置目录。如目录不存在，请先手动创建。',
+      },
     },
     customKeyLabel: '自定义密钥',
     customKeyPlaceholder: '输入自定义密钥（至少16个字符）',
diff --git a/frontend/src/views/user/KeysView.vue b/frontend/src/views/user/KeysView.vue
index 4644265d..756a18ac 100644
--- a/frontend/src/views/user/KeysView.vue
+++ b/frontend/src/views/user/KeysView.vue
@@ -336,6 +336,7 @@
       :show="showUseKeyModal"
       :api-key="selectedKey?.key || ''"
       :base-url="publicSettings?.api_base_url || ''"
+      :platform="selectedKey?.group?.platform || null"
       @close="closeUseKeyModal"
     />