diff --git a/diff.txt b/diff.txt
new file mode 100644
index 0000000..6eafee2
Binary files /dev/null and b/diff.txt differ
diff --git a/diff_utf8.txt b/diff_utf8.txt
new file mode 100644
index 0000000..a62eecc
--- /dev/null
+++ b/diff_utf8.txt
@@ -0,0 +1,37 @@
+diff --git a/src/extension.ts b/src/extension.ts
+index 7720f87..e47cca3 100644
+--- a/src/extension.ts
++++ b/src/extension.ts
+@@ -1017,7 +1017,8 @@ class SidebarChatProvider implements vscode.WebviewViewProvider {
+     // --------------------------------------------------------
+     private async _sendModels() {
+         if (!this._view) { return; }
+-        const { ollamaBase, defaultModel } = getConfig();
++        const { ollamaBase } = getConfig();
++        let defaultModel = getConfig().defaultModel;
+         try {
+             const isLMStudio = ollamaBase.includes('1234') || ollamaBase.includes('v1');
+             let models: string[] = [];
+@@ -1034,9 +1035,21 @@ class SidebarChatProvider implements vscode.WebviewViewProvider {
+ 
+             if (models.length === 0) {
+                 models = [defaultModel];
+-            } else if (!models.includes(defaultModel)) {
++            }
++
++            // 媛€?몄삩 紐⑤뜽 紐⑸줉???꾩옱 defaultModel???녿떎硫? 遺덈윭??泥?踰덉㎏ 紐⑤뜽濡?defaultModel???먮룞 ?낅뜲?댄듃
++            if (!models.includes(defaultModel) && models.length > 0) {
++                defaultModel = models[0];
++                await vscode.workspace.getConfiguration('connectAiLab').update('defaultModel', defaultModel, vscode.ConfigurationTarget.Global);
++            }
++            
++            // defaultModel????긽 ?쒕∼?ㅼ슫 理쒖긽?⑥뿉 ?ㅻ룄濡??ㅼ젙
++            const defaultIdx = models.indexOf(defaultModel);
++            if (defaultIdx > 0) {
++                models.splice(defaultIdx, 1);
+                 models.unshift(defaultModel);
+             }
++
+             this._view.webview.postMessage({ type: 'modelsList', value: models });
+         } catch {
+             this._view.webview.postMessage({ type: 'modelsList', value: [defaultModel] });
diff --git a/package-lock.json b/package-lock.json
index 6485b2d..06733e7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "connect-ai-lab",
-  "version": "2.2.10",
+  "version": "2.2.15",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "connect-ai-lab",
-      "version": "2.2.10",
+      "version": "2.2.15",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.15.0",
diff --git a/src/extension.ts b/src/extension.ts
index 7720f87..e47cca3 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -1017,7 +1017,8 @@ class SidebarChatProvider implements vscode.WebviewViewProvider {
     // --------------------------------------------------------
     private async _sendModels() {
         if (!this._view) { return; }
-        const { ollamaBase, defaultModel } = getConfig();
+        const { ollamaBase } = getConfig();
+        let defaultModel = getConfig().defaultModel;
         try {
             const isLMStudio = ollamaBase.includes('1234') || ollamaBase.includes('v1');
             let models: string[] = [];
@@ -1034,9 +1035,21 @@ class SidebarChatProvider implements vscode.WebviewViewProvider {
 
             if (models.length === 0) {
                 models = [defaultModel];
-            } else if (!models.includes(defaultModel)) {
+            }
+
+            // 가져온 모델 목록에 현재 defaultModel이 없다면, 불러온 첫 번째 모델로 defaultModel을 자동 업데이트
+            if (!models.includes(defaultModel) && models.length > 0) {
+                defaultModel = models[0];
+                await vscode.workspace.getConfiguration('connectAiLab').update('defaultModel', defaultModel, vscode.ConfigurationTarget.Global);
+            }
+            
+            // defaultModel이 항상 드롭다운 최상단에 오도록 설정
+            const defaultIdx = models.indexOf(defaultModel);
+            if (defaultIdx > 0) {
+                models.splice(defaultIdx, 1);
                 models.unshift(defaultModel);
             }
+
             this._view.webview.postMessage({ type: 'modelsList', value: models });
         } catch {
             this._view.webview.postMessage({ type: 'modelsList', value: [defaultModel] });