diff --git a/app/(chat)/api/chat/route.ts b/app/(chat)/api/chat/route.ts
index 23f8a49..6b915ff 100644
--- a/app/(chat)/api/chat/route.ts
+++ b/app/(chat)/api/chat/route.ts
@@ -994,6 +994,7 @@ export async function POST(request: Request) {
     // 获取语言模型实例
     let languageModel;
     let actualModelId: string;
+    let resolvedModelSupportsImageGen = false;
 
     if (isUUID) {
       // 从数据库获取动态配置的模型
@@ -1055,6 +1056,7 @@ export async function POST(request: Request) {
       // 对于动态模型，我们需要从数据库获取 modelId
       const finalModelData = await getAiModelById({ id: targetModelId });
       actualModelId = finalModelData?.modelId ?? targetModelId;
+      resolvedModelSupportsImageGen = Boolean(finalModelData?.supportsImageGen);
     } else {
       // 使用预定义的模型
       languageModel = myProvider.languageModel(finalModelId);
@@ -2456,6 +2458,10 @@ export async function POST(request: Request) {
         }
 
         // 常规文本模型使用 streamText
+        const streamRequestTimeoutMs = resolvedModelSupportsImageGen ? 180_000 : 90_000;
+        const shouldDisableSmoothStream =
+          resolvedModelSupportsImageGen || isVolcanoVideoModel;
+
         const result = streamText({
           model: languageModel,
           system: systemPrompt({ selectedChatModel: finalModelId, requestHints }),
@@ -2463,8 +2469,11 @@ export async function POST(request: Request) {
           stopWhen: stepCountIs(5),
           experimental_activeTools:
             finalModelId === "chat-model-reasoning" || isVolcanoVideoModel ? [] : activeTools,
-          experimental_transform: smoothStream({ chunking: "word" }),
+          experimental_transform: shouldDisableSmoothStream
+            ? undefined
+            : smoothStream({ chunking: "word" }),
           tools: isVolcanoVideoModel ? {} : tools, // 🆕 视频模型禁用工具
+          abortSignal: AbortSignal.timeout(streamRequestTimeoutMs),
           experimental_telemetry: {
             isEnabled: isProductionEnvironment,
             functionId: "stream-text",