diff --git a/server/ai.mjs b/server/ai.mjs
index a8095d4..f7a06fd 100644
--- a/server/ai.mjs
+++ b/server/ai.mjs
@@ -16,6 +16,12 @@
 const OPENROUTER_URL = 'https://openrouter.ai/api/v1/chat/completions';
 
 export const PROVIDERS = {
+  glmflash: {
+    label: 'GLM 5.3 Flash', provider: 'Z.ai', envKey: 'ZAI_API_KEY',
+    model: () => process.env.GLM_FLASH_MODEL || 'glm-5.3-flash',
+    or: () => process.env.GLM_FLASH_OR_MODEL || 'z-ai/glm-5.3-flash',
+    url: 'https://api.z.ai/api/paas/v4/chat/completions', style: 'openai',
+  },
   glm: {
     label: 'GLM', provider: 'Z.ai', envKey: 'ZAI_API_KEY',
     model: () => process.env.GLM_MODEL || 'glm-5.3',
@@ -213,7 +219,7 @@ function extractJson(raw) {
 
 /** Zinciri sırayla dener; ilk başarılı sonucu döndürür. */
 export async function analyzeSpec({ text, fileName, tender, chain }) {
-  const order = (Array.isArray(chain) && chain.length ? chain : ['glm', 'deepseek', 'gemini', 'grok', 'gpt', 'claude'])
+  const order = (Array.isArray(chain) && chain.length ? chain : ['glmflash', 'glm', 'deepseek', 'gemini', 'grok', 'gpt', 'claude'])
     .filter((id) => PROVIDERS[id]);
   const userPrompt = buildUserPrompt({ text, fileName, tender });
   const attempts = [];
diff --git a/src/context/AppContext.jsx b/src/context/AppContext.jsx
index 0fe370c..3d61842 100644
--- a/src/context/AppContext.jsx
+++ b/src/context/AppContext.jsx
@@ -192,6 +192,7 @@ export const AppProvider = ({ children }) => {
   // AI Model Yönetimi (admin panelden seçilebilir + fallback zinciri)
   // ---------------------------------------------------------------------------
   const AI_MODEL_CATALOG = [
+    { id: 'glmflash', label: 'GLM 5.3 Flash', provider: 'Z.ai', or: 'z-ai/glm-5.3-flash', model: 'glm-5.3-flash', renk: 'blue' },
     { id: 'glm', label: 'GLM Latest', provider: 'Z.ai', or: '~z-ai/glm-latest', model: 'glm-5.3', renk: 'blue' },
     { id: 'deepseek', label: 'DeepSeek V4 Flash Latest', provider: 'DeepSeek', or: '~deepseek/deepseek-v4-flash-latest', model: 'deepseek-chat', renk: 'indigo' },
     { id: 'gemini', label: 'Gemini Flash Latest', provider: 'Google', or: '~google/gemini-flash-latest', model: 'gemini-flash-latest', renk: 'amber' },
@@ -200,13 +201,24 @@ export const AppProvider = ({ children }) => {
     { id: 'claude', label: 'Claude Opus Latest', provider: 'Anthropic', or: '~anthropic/claude-opus-latest', model: 'claude-opus-5', renk: 'orange' }
   ];
 
-  // Varsayılan fallback zinciri: GLM (birincil) → DeepSeek → Gemini
+  // Varsayılan fallback zinciri: GLM 5.3 Flash (birincil) → GLM Latest → DeepSeek → Gemini
+  const VARSAYILAN_ZINCIR = ['glmflash', 'glm', 'deepseek', 'gemini'];
+  const ZINCIR_SURUM = 2; // artırıldığında kayıtlı zincire yeni birincil eklenir
+
   const [aiModelConfig, setAiModelConfig] = useState(() => {
     const saved = localStorage.getItem('ihaleist_ai_model_config');
     if (saved) {
-      try { return JSON.parse(saved); } catch { /* yoksay */ }
+      try {
+        const cfg = JSON.parse(saved);
+        // Geçiş: yeni birincil model eklendiyse kayıtlı zincirin başına al
+        if ((cfg.surum || 1) < ZINCIR_SURUM) {
+          const chain = Array.isArray(cfg.chain) ? cfg.chain : [];
+          return { ...cfg, surum: ZINCIR_SURUM, chain: ['glmflash', ...chain.filter((id) => id !== 'glmflash')] };
+        }
+        return cfg;
+      } catch { /* yoksay */ }
     }
-    return { chain: ['glm', 'deepseek', 'gemini'] };
+    return { chain: VARSAYILAN_ZINCIR, surum: ZINCIR_SURUM };
   });
 
   useEffect(() => {