diff --git a/app/components/chat.tsx b/app/components/chat.tsx
index c0d2580cd..65ff17bb0 100644
--- a/app/components/chat.tsx
+++ b/app/components/chat.tsx
@@ -25,6 +25,7 @@ import CancelIcon from "../icons/cancel.svg";
 import StopIcon from "../icons/pause.svg";
 import McpToolIcon from "../icons/tool.svg";
 import {
+  BOT_HELLO,
   ChatMessage,
   createMessage,
   DEFAULT_TOPIC,
@@ -1055,6 +1056,18 @@ function _Chat() {
     return session.mask.hideContext ? [] : session.mask.context.slice();
   }, [session.mask.context, session.mask.hideContext]);
 
+  if (
+    context.length === 0 &&
+    session.messages.at(0)?.content !== BOT_HELLO.content
+  ) {
+    // Intentionally prevent adding BOT_HELLO message
+    // const copiedHello = Object.assign({}, BOT_HELLO);
+    // if (!accessStore.isAuthorized()) {
+    //   copiedHello.content = Locale.Error.Unauthorized;
+    // }
+    // context.push(copiedHello);
+  }
+
   // preview messages
   const renderMessages = useMemo(() => {
     return context.concat(session.messages as RenderMessage[]).concat(
diff --git a/app/constant.ts b/app/constant.ts
index 8c426d979..314dce107 100644
--- a/app/constant.ts
+++ b/app/constant.ts
@@ -329,8 +329,8 @@ You are an AI assistant with access to system tools. Your role is to help users
 
 4. INTERACTION FLOW:
    A. When user makes a request:
-      - IMMEDIATELY use appropriate tool if available
-      - DO NOT ask if user wants you to use the tool
+      - Use an appropriate tool if available
+      - ASK if user wants you to use the tool
       - DO NOT just describe what you could do
    B. After receiving tool response:
       - Explain results clearly
@@ -653,6 +653,17 @@ const siliconflowModels = [
 
 let seq = 1000; // 内置的模型序号生成器从1000开始
 export const DEFAULT_MODELS = [
+  ...googleModels.map((name) => ({
+    name,
+    available: true,
+    sorted: seq++,
+    provider: {
+      id: "google",
+      providerName: "Google",
+      providerType: "google",
+      sorted: 1, // Keep original provider sort order
+    },
+  })),
   ...openaiModels.map((name) => ({
     name,
     available: true,
@@ -661,7 +672,7 @@ export const DEFAULT_MODELS = [
       id: "openai",
       providerName: "OpenAI",
       providerType: "openai",
-      sorted: 1, // 这里是固定的，确保顺序与之前内置的版本一致
+      sorted: 2, // 这里是固定的，确保顺序与之前内置的版本一致
     },
   })),
   ...openaiModels.map((name) => ({
@@ -672,17 +683,6 @@ export const DEFAULT_MODELS = [
       id: "azure",
       providerName: "Azure",
       providerType: "azure",
-      sorted: 2,
-    },
-  })),
-  ...googleModels.map((name) => ({
-    name,
-    available: true,
-    sorted: seq++,
-    provider: {
-      id: "google",
-      providerName: "Google",
-      providerType: "google",
       sorted: 3,
     },
   })),