diff --git a/server.js b/server.js
index f837a41b..8d34c473 100644
--- a/server.js
+++ b/server.js
@@ -432,7 +432,7 @@ async function analyzeWithGemini(title, fullText, url) {
     if (!genAI) return { summary: (fullText || '').slice(0, 120) || '（要約なし）', topics: ['その他'], readingTime: 3 };
     try {
         const model = genAI.getGenerativeModel({
-            model: 'gemini-2.0-flash-lite',
+            model: 'gemini-2.5-flash',
             generationConfig: { responseMimeType: 'application/json' }
         });
         const prompt = `記事分析してJSONで返答:
@@ -1745,7 +1745,7 @@ function buildRouter() {
         if (!title && !body) return res.status(400).json({ error: 'title or body required' });
         try {
             const model = genAI.getGenerativeModel({
-                model: 'gemini-2.0-flash-lite',
+                model: 'gemini-2.5-flash',
                 generationConfig: { responseMimeType: 'application/json' }
             });
             const excerpt = smartExtract(body, 2000);