diff --git a/lib/ai/providers/gemini-image.ts b/lib/ai/providers/gemini-image.ts
index 98cc368c4..1dc5c0e76 100644
--- a/lib/ai/providers/gemini-image.ts
+++ b/lib/ai/providers/gemini-image.ts
@@ -533,6 +533,8 @@ function formatImageResponse(
 const GRSAI_NANO_BANANA_SUBMIT_TIMEOUT_MS = 30000;
 const GRSAI_NANO_BANANA_POLL_TIMEOUT_MS = 30000;
 const GRSAI_NANO_BANANA_POLL_INTERVAL_MS = 5000;
+const GRSAI_GPT_IMAGE_TIMEOUT_MS = 300000;
+const GRSAI_GPT_IMAGE_4K_TIMEOUT_MS = 420000;
 
 function isRecord(value: unknown): value is Record<string, any> {
   return Boolean(value && typeof value === "object" && !Array.isArray(value));
@@ -1003,7 +1005,10 @@ async function sendGeminiRequest(
       `${apiLogPrefix} Resolved size: aspectRatio=${resolvedAspectRatio}, imageSize=${imageParams?.imageSize || "2K"} => ${resolvedSize}`
     );
 
-    const timeout = imageParams?.imageSize === "4K" ? 300000 : 120000;
+    const timeout =
+      imageParams?.imageSize === "4K"
+        ? GRSAI_GPT_IMAGE_4K_TIMEOUT_MS
+        : GRSAI_GPT_IMAGE_TIMEOUT_MS;
     logger.debug(`${apiLogPrefix} Timeout set to ${timeout / 1000} seconds for ${imageParams?.imageSize || "default"}`);
     return sendGrsaiGptImageRequest({
       baseURL,
diff --git a/lib/ai/runtime/model-health.ts b/lib/ai/runtime/model-health.ts
index 28a3a7a7a..5b8585c69 100644
--- a/lib/ai/runtime/model-health.ts
+++ b/lib/ai/runtime/model-health.ts
@@ -70,6 +70,7 @@ export function classifyAiModelHealthFailure(error: unknown): {
 
   if (
     normalized.includes("生成结果未通过替换质检") ||
+    normalized.includes("output_moderation") ||
     normalized.includes("quality check") ||
     normalized.includes("review result") ||
     normalized.includes("content policy") ||