diff --git a/src/api/qwenChat.ts b/src/api/qwenChat.ts
index 2bf0675..b13c413 100644
--- a/src/api/qwenChat.ts
+++ b/src/api/qwenChat.ts
@@ -9,6 +9,8 @@ export interface ChatMessagePayload {
 
 interface StreamOptions {
   messages: ChatMessagePayload[];
+  /** 与后端 OpenAI 兼容字段一致，不传则由服务端默认模型处理 */
+  model?: string;
   onToken: (token: string) => void;
   signal?: AbortSignal;
   timeoutMs?: number;
@@ -84,12 +86,15 @@ export async function streamQwenChat(options: StreamOptions): Promise<void> {
   const timeoutSignal = createTimeoutAbortSignal(options.timeoutMs ?? 90000);
   const mergedSignal = mergeAbortSignals([options.signal, timeoutSignal]);
 
-  await fetchEventSource(`${API_BASE_URL}/api/qwen/chat/stream`, {
+  await fetchEventSource(`${API_BASE_URL}/api/client/v1/chat/completions/stream`, {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
     },
-    body: JSON.stringify({ messages: options.messages }),
+    body: JSON.stringify({
+      messages: options.messages,
+      ...(options.model ? { model: options.model } : {}),
+    }),
     signal: mergedSignal,
     openWhenHidden: true,
     async onopen(response) {
diff --git a/src/pages/index.tsx b/src/pages/index.tsx
index 8ab1201..8fe5531 100644
--- a/src/pages/index.tsx
+++ b/src/pages/index.tsx
@@ -11,7 +11,7 @@ import {
   ThunderboltOutlined,
   UserOutlined,
 } from "@ant-design/icons";
-import { Button, Collapse, Drawer, Input, Layout, Typography } from "antd";
+import { Button, Collapse, Drawer, Input, Layout, Select, Typography } from "antd";
 import { isAbortLikeError, streamQwenChat, type ChatMessagePayload } from "../api/qwenChat";
 import StreamMessage from "../components/StreamMessage";
 
@@ -37,6 +37,14 @@ const STREAM_TIMEOUT_MS = 90000;
 const MAX_STREAM_RETRY = 1;
 const CONTEXT_WINDOW_SIZE = 8;
 
+/** 展示名与请求 model 字段；需与后端实际支持的模型 id 一致 */
+const DEFAULT_QWEN_MODEL = "qwen3.5-flash";
+const QWEN_MODEL_OPTIONS: { value: string; label: string }[] = [
+  { value: "qwen3-max", label: "Qwen3-Max" },
+  { value: "qwen3.6-plus", label: "Qwen3.6-Plus" },
+  { value: DEFAULT_QWEN_MODEL, label: "Qwen3.5-Flash" },
+];
+
 export default function HomePage() {
   const [collapsed, setCollapsed] = useState(false);
   const [mobileSidebarOpen, setMobileSidebarOpen] = useState(false);
@@ -47,6 +55,7 @@ export default function HomePage() {
   const [isSending, setIsSending] = useState(false);
   const [deepThink, setDeepThink] = useState(false);
   const [smartSearch, setSmartSearch] = useState(false);
+  const [selectedModel, setSelectedModel] = useState(DEFAULT_QWEN_MODEL);
   const messageListRef = useRef<HTMLDivElement | null>(null);
   const abortRef = useRef<AbortController | null>(null);
 
@@ -136,6 +145,7 @@ export default function HomePage() {
       try {
         await streamQwenChat({
           messages: retryMessages,
+          model: selectedModel,
           signal: controller.signal,
           timeoutMs: STREAM_TIMEOUT_MS,
           onToken: (token) => {
@@ -318,9 +328,16 @@ export default function HomePage() {
               className="h-6 w-6 shrink-0 object-contain md:hidden"
               decoding="async"
             />
-            <Typography.Text className="text-[15px] font-medium text-neutral-800">
-              国内前端主流 CI 工具
-            </Typography.Text>
+            <Select
+              className="min-w-[190px]"
+              variant="borderless"
+              popupMatchSelectWidth={false}
+              options={QWEN_MODEL_OPTIONS}
+              value={selectedModel}
+              onChange={setSelectedModel}
+              disabled={isSending}
+              aria-label="选择对话模型"
+            />
           </div>
           <span className="rounded-full border border-[var(--ds-border)] bg-neutral-50 px-3 py-1 text-xs text-neutral-500">
             快速模式
@@ -377,7 +394,21 @@ export default function HomePage() {
                           ]}
                         />
                       )}
-                      {item.role === "assistant" && <StreamMessage content={item.content} />}
+                      {item.role === "assistant" &&
+                        (item.content ? (
+                          <StreamMessage content={item.content} />
+                        ) : (
+                          <div className="rounded-2xl border border-[var(--ds-border)] bg-neutral-50/80 px-4 py-3 text-[14px] text-neutral-500">
+                            <div className="flex items-center gap-2">
+                              <span>正在回复</span>
+                              <span className="inline-flex items-center gap-1">
+                                <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-neutral-400 [animation-delay:-0.3s]" />
+                                <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-neutral-400 [animation-delay:-0.15s]" />
+                                <span className="h-1.5 w-1.5 animate-bounce rounded-full bg-neutral-400" />
+                              </span>
+                            </div>
+                          </div>
+                        ))}
                       {item.role === "user" && item.content}
                     </div>
                   </div>