diff --git a/src/App.tsx b/src/App.tsx
index 5c237e4c5..a4af76b4a 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -198,6 +198,7 @@ function App() {
     switchProvider,
     deleteProvider,
     saveUsageScript,
+    setAsDefaultModel,
   } = useProviderActions(activeApp);
 
   const disableOmoMutation = useDisableCurrentOmo();
@@ -670,6 +671,9 @@ function App() {
                         activeApp === "claude" ? handleOpenTerminal : undefined
                       }
                       onCreate={() => setIsAddOpen(true)}
+                      onSetAsDefault={
+                        activeApp === "openclaw" ? setAsDefaultModel : undefined
+                      }
                     />
                   </motion.div>
                 </AnimatePresence>
diff --git a/src/components/providers/ProviderActions.tsx b/src/components/providers/ProviderActions.tsx
index b54c04a4a..d53c0a486 100644
--- a/src/components/providers/ProviderActions.tsx
+++ b/src/components/providers/ProviderActions.tsx
@@ -10,6 +10,7 @@ import {
   Terminal,
   TestTube2,
   Trash2,
+  Zap,
 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { Button } from "@/components/ui/button";
@@ -36,6 +37,9 @@ interface ProviderActionsProps {
   isAutoFailoverEnabled?: boolean;
   isInFailoverQueue?: boolean;
   onToggleFailover?: (enabled: boolean) => void;
+  // OpenClaw: default model
+  isDefaultModel?: boolean;
+  onSetAsDefault?: () => void;
 }
 
 export function ProviderActions({
@@ -58,6 +62,9 @@ export function ProviderActions({
   isAutoFailoverEnabled = false,
   isInFailoverQueue = false,
   onToggleFailover,
+  // OpenClaw: default model
+  isDefaultModel = false,
+  onSetAsDefault,
 }: ProviderActionsProps) {
   const { t } = useTranslation();
   const iconButtonClass = "h-8 w-8 p-1";
@@ -120,10 +127,12 @@ export function ProviderActions({
     if (isAdditiveMode) {
       if (isInConfig) {
         return {
-          disabled: false,
+          disabled: isDefaultModel === true,
           variant: "secondary" as const,
-          className:
+          className: cn(
             "bg-orange-100 text-orange-600 hover:bg-orange-200 dark:bg-orange-900/50 dark:text-orange-400 dark:hover:bg-orange-900/70",
+            isDefaultModel && "opacity-40 cursor-not-allowed",
+          ),
           icon: <Minus className="h-4 w-4" />,
           text: t("provider.removeFromConfig", { defaultValue: "移除" }),
         };
@@ -191,6 +200,26 @@ export function ProviderActions({
 
   return (
     <div className="flex items-center gap-1.5">
+      {appId === "openclaw" && isInConfig && onSetAsDefault && (
+        <Button
+          size="sm"
+          variant={isDefaultModel ? "secondary" : "default"}
+          onClick={isDefaultModel ? undefined : onSetAsDefault}
+          disabled={isDefaultModel}
+          className={cn(
+            "w-[4.5rem] px-2.5",
+            isDefaultModel
+              ? "bg-gray-200 text-muted-foreground dark:bg-gray-700 opacity-60 cursor-not-allowed"
+              : "bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700",
+          )}
+        >
+          <Zap className="h-4 w-4" />
+          {isDefaultModel
+            ? t("provider.isDefault", { defaultValue: "默认" })
+            : t("provider.setAsDefault", { defaultValue: "启用" })}
+        </Button>
+      )}
+
       <Button
         size="sm"
         variant={buttonState.variant}
diff --git a/src/components/providers/ProviderCard.tsx b/src/components/providers/ProviderCard.tsx
index 2a3a2946b..5f7a3eb91 100644
--- a/src/components/providers/ProviderCard.tsx
+++ b/src/components/providers/ProviderCard.tsx
@@ -48,6 +48,9 @@ interface ProviderCardProps {
   isInFailoverQueue?: boolean; // 是否在故障转移队列中
   onToggleFailover?: (enabled: boolean) => void; // 切换故障转移队列
   activeProviderId?: string; // 代理当前实际使用的供应商 ID（用于故障转移模式下标注绿色边框）
+  // OpenClaw: default model
+  isDefaultModel?: boolean;
+  onSetAsDefault?: () => void;
 }
 
 const extractApiUrl = (provider: Provider, fallbackText: string) => {
@@ -108,6 +111,9 @@ export function ProviderCard({
   isInFailoverQueue = false,
   onToggleFailover,
   activeProviderId,
+  // OpenClaw: default model
+  isDefaultModel,
+  onSetAsDefault,
 }: ProviderCardProps) {
   const { t } = useTranslation();
 
@@ -386,6 +392,9 @@ export function ProviderCard({
               isAutoFailoverEnabled={isAutoFailoverEnabled}
               isInFailoverQueue={isInFailoverQueue}
               onToggleFailover={onToggleFailover}
+              // OpenClaw: default model
+              isDefaultModel={isDefaultModel}
+              onSetAsDefault={onSetAsDefault}
             />
           </div>
         </div>
diff --git a/src/components/providers/ProviderList.tsx b/src/components/providers/ProviderList.tsx
index ebc4b7cf2..8c4f635cc 100644
--- a/src/components/providers/ProviderList.tsx
+++ b/src/components/providers/ProviderList.tsx
@@ -19,6 +19,7 @@ import { useQuery } from "@tanstack/react-query";
 import type { Provider } from "@/types";
 import type { AppId } from "@/lib/api";
 import { providersApi } from "@/lib/api/providers";
+import { openclawApi } from "@/lib/api/openclaw";
 import { useDragSort } from "@/hooks/useDragSort";
 import { ProviderCard } from "@/components/providers/ProviderCard";
 import { ProviderEmptyState } from "@/components/providers/ProviderEmptyState";
@@ -51,6 +52,7 @@ interface ProviderListProps {
   isProxyRunning?: boolean; // 代理服务运行状态
   isProxyTakeover?: boolean; // 代理接管模式（Live配置已被接管）
   activeProviderId?: string; // 代理当前实际使用的供应商 ID（用于故障转移模式下标注绿色边框）
+  onSetAsDefault?: (provider: Provider) => void; // OpenClaw: set as default model
 }
 
 export function ProviderList({
@@ -71,6 +73,7 @@ export function ProviderList({
   isProxyRunning = false,
   isProxyTakeover = false,
   activeProviderId,
+  onSetAsDefault,
 }: ProviderListProps) {
   const { t } = useTranslation();
   const { sortedProviders, sensors, handleDragEnd } = useDragSort(
@@ -105,6 +108,22 @@ export function ProviderList({
     [appId, opencodeLiveIds, openclawLiveIds],
   );
 
+  // OpenClaw: query default model to determine which provider is default
+  const { data: openclawDefaultModel } = useQuery({
+    queryKey: ["openclawDefaultModel"],
+    queryFn: () => openclawApi.getDefaultModel(),
+    enabled: appId === "openclaw",
+  });
+
+  const isProviderDefaultModel = useCallback(
+    (providerId: string): boolean => {
+      if (appId !== "openclaw" || !openclawDefaultModel?.primary) return false;
+      return openclawDefaultModel.primary.startsWith(providerId + "/");
+    },
+    [appId, openclawDefaultModel],
+  );
+
+  // 故障转移相关
   const { data: isAutoFailoverEnabled } = useAutoFailoverEnabled(appId);
   const { data: failoverQueue } = useFailoverQueue(appId);
   const addToQueue = useAddToFailoverQueue();
@@ -253,6 +272,11 @@ export function ProviderList({
                   handleToggleFailover(provider.id, enabled)
                 }
                 activeProviderId={activeProviderId}
+                // OpenClaw: default model
+                isDefaultModel={isProviderDefaultModel(provider.id)}
+                onSetAsDefault={
+                  onSetAsDefault ? () => onSetAsDefault(provider) : undefined
+                }
               />
             );
           })}
@@ -365,6 +389,9 @@ interface SortableProviderCardProps {
   isInFailoverQueue: boolean;
   onToggleFailover: (enabled: boolean) => void;
   activeProviderId?: string;
+  // OpenClaw: default model
+  isDefaultModel?: boolean;
+  onSetAsDefault?: () => void;
 }
 
 function SortableProviderCard({
@@ -392,6 +419,8 @@ function SortableProviderCard({
   isInFailoverQueue,
   onToggleFailover,
   activeProviderId,
+  isDefaultModel,
+  onSetAsDefault,
 }: SortableProviderCardProps) {
   const {
     setNodeRef,
@@ -441,6 +470,9 @@ function SortableProviderCard({
         isInFailoverQueue={isInFailoverQueue}
         onToggleFailover={onToggleFailover}
         activeProviderId={activeProviderId}
+        // OpenClaw: default model
+        isDefaultModel={isDefaultModel}
+        onSetAsDefault={onSetAsDefault}
       />
     </div>
   );
diff --git a/src/hooks/useProviderActions.ts b/src/hooks/useProviderActions.ts
index 0f1d9bb91..2f2083df8 100644
--- a/src/hooks/useProviderActions.ts
+++ b/src/hooks/useProviderActions.ts
@@ -3,7 +3,12 @@ import { useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import { useTranslation } from "react-i18next";
 import { providersApi, settingsApi, openclawApi, type AppId } from "@/lib/api";
-import type { Provider, UsageScript } from "@/types";
+import type {
+  Provider,
+  UsageScript,
+  OpenClawProviderConfig,
+  OpenClawDefaultModel,
+} from "@/types";
 import type { OpenClawSuggestedDefaults } from "@/config/openclawProviderPresets";
 import {
   useAddProviderMutation,
@@ -218,12 +223,54 @@ export function useProviderActions(activeApp: AppId) {
     [activeApp, queryClient, t],
   );
 
+  // Set provider as default model (OpenClaw only)
+  const setAsDefaultModel = useCallback(
+    async (provider: Provider) => {
+      const config = provider.settingsConfig as OpenClawProviderConfig;
+      if (!config.models || config.models.length === 0) {
+        toast.error(
+          t("notifications.openclawNoModels", {
+            defaultValue: "该供应商没有配置模型",
+          }),
+        );
+        return;
+      }
+
+      const model: OpenClawDefaultModel = {
+        primary: `${provider.id}/${config.models[0].id}`,
+        fallbacks: config.models.slice(1).map((m) => `${provider.id}/${m.id}`),
+      };
+
+      try {
+        await openclawApi.setDefaultModel(model);
+        await queryClient.invalidateQueries({
+          queryKey: ["openclawDefaultModel"],
+        });
+        toast.success(
+          t("notifications.openclawDefaultModelSet", {
+            defaultValue: "已设为默认模型",
+          }),
+          { closeButton: true },
+        );
+      } catch (error) {
+        const detail =
+          extractErrorMessage(error) ||
+          t("notifications.openclawDefaultModelSetFailed", {
+            defaultValue: "设置默认模型失败",
+          });
+        toast.error(detail);
+      }
+    },
+    [queryClient, t],
+  );
+
   return {
     addProvider,
     updateProvider,
     switchProvider,
     deleteProvider,
     saveUsageScript,
+    setAsDefaultModel,
     isLoading:
       addProviderMutation.isPending ||
       updateProviderMutation.isPending ||
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 8d9a687ed..d9df8cbe6 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -88,6 +88,8 @@
     "addOpenCodeProvider": "Add OpenCode Provider",
     "addToConfig": "Add",
     "removeFromConfig": "Remove",
+    "setAsDefault": "Enable",
+    "isDefault": "Default",
     "inConfig": "Added",
     "addProviderHint": "Fill in the information to quickly switch providers in the list.",
     "editClaudeProvider": "Edit Claude Code Provider",
@@ -163,7 +165,10 @@
     "settingsSaveFailed": "Failed to save settings: {{error}}",
     "openAIChatFormatHint": "This provider uses OpenAI Chat format and requires the proxy service to be enabled",
     "openLinkFailed": "Failed to open link",
-    "openclawModelsRegistered": "Models have been registered to /model list"
+    "openclawModelsRegistered": "Models have been registered to /model list",
+    "openclawDefaultModelSet": "Set as default model",
+    "openclawDefaultModelSetFailed": "Failed to set default model",
+    "openclawNoModels": "No models configured"
   },
   "confirm": {
     "deleteProvider": "Delete Provider",
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index 3f7458300..02effd72b 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -88,6 +88,8 @@
     "addOpenCodeProvider": "OpenCode プロバイダーを追加",
     "addToConfig": "追加",
     "removeFromConfig": "削除",
+    "setAsDefault": "有効化",
+    "isDefault": "デフォルト",
     "inConfig": "追加済み",
     "addProviderHint": "一覧にすばやく切り替えられるよう、ここに情報を入力してください。",
     "editClaudeProvider": "Claude Code プロバイダーを編集",
@@ -163,7 +165,10 @@
     "settingsSaveFailed": "設定の保存に失敗しました: {{error}}",
     "openAIChatFormatHint": "このプロバイダーは OpenAI Chat フォーマットを使用しており、プロキシサービスの有効化が必要です",
     "openLinkFailed": "リンクを開けませんでした",
-    "openclawModelsRegistered": "モデルが /model リストに登録されました"
+    "openclawModelsRegistered": "モデルが /model リストに登録されました",
+    "openclawDefaultModelSet": "デフォルトモデルに設定しました",
+    "openclawDefaultModelSetFailed": "デフォルトモデルの設定に失敗しました",
+    "openclawNoModels": "モデルが設定されていません"
   },
   "confirm": {
     "deleteProvider": "プロバイダーを削除",
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 3d9d9ec54..c4012ac51 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -88,6 +88,8 @@
     "addOpenCodeProvider": "添加 OpenCode 供应商",
     "addToConfig": "添加",
     "removeFromConfig": "移除",
+    "setAsDefault": "启用",
+    "isDefault": "默认",
     "inConfig": "已添加",
     "addProviderHint": "填写信息后即可在列表中快速切换供应商。",
     "editClaudeProvider": "编辑 Claude Code 供应商",
@@ -163,7 +165,10 @@
     "settingsSaveFailed": "保存设置失败：{{error}}",
     "openAIChatFormatHint": "此供应商使用 OpenAI Chat 格式，需要开启代理服务才能正常使用",
     "openLinkFailed": "链接打开失败",
-    "openclawModelsRegistered": "模型已注册到 /model 列表"
+    "openclawModelsRegistered": "模型已注册到 /model 列表",
+    "openclawDefaultModelSet": "已设为默认模型",
+    "openclawDefaultModelSetFailed": "设置默认模型失败",
+    "openclawNoModels": "该供应商没有配置模型"
   },
   "confirm": {
     "deleteProvider": "删除供应商",
diff --git a/src/lib/api/index.ts b/src/lib/api/index.ts
index 38d6b09e2..6a797f1ea 100644
--- a/src/lib/api/index.ts
+++ b/src/lib/api/index.ts
@@ -8,6 +8,7 @@ export { usageApi } from "./usage";
 export { vscodeApi } from "./vscode";
 export { proxyApi } from "./proxy";
 export { openclawApi } from "./openclaw";
+export { sessionsApi } from "./sessions";
 export * as configApi from "./config";
 export type { ProviderSwitchEvent } from "./providers";
 export type { Prompt } from "./prompts";
diff --git a/src/lib/query/mutations.ts b/src/lib/query/mutations.ts
index c5a263deb..da83c204f 100644
--- a/src/lib/query/mutations.ts
+++ b/src/lib/query/mutations.ts
@@ -187,6 +187,9 @@ export const useSwitchProviderMutation = (appId: AppId) => {
         await queryClient.invalidateQueries({
           queryKey: ["openclawLiveProviderIds"],
         });
+        await queryClient.invalidateQueries({
+          queryKey: ["openclawDefaultModel"],
+        });
       }
 
       try {