diff --git a/src/core/rag/rag-engine.ts b/src/core/rag/rag-engine.ts
index ccc1757..becd4f8 100644
--- a/src/core/rag/rag-engine.ts
+++ b/src/core/rag/rag-engine.ts
@@ -25,7 +25,16 @@ export class RAGEngine {
 		this.app = app
 		this.settings = settings
 		this.vectorManager = dbManager.getVectorManager()
-		this.embeddingModel = getEmbeddingModel(settings)
+		if (settings.embeddingModelId && settings.embeddingModelId.trim() !== '') {
+			try {
+				this.embeddingModel = getEmbeddingModel(settings)
+			} catch (error) {
+				console.warn('Failed to initialize embedding model:', error)
+				this.embeddingModel = null
+			}
+		} else {
+			this.embeddingModel = null
+		}
 	}
 
 	cleanup() {
@@ -35,7 +44,16 @@ export class RAGEngine {
 
 	setSettings(settings: InfioSettings) {
 		this.settings = settings
-		this.embeddingModel = getEmbeddingModel(settings)
+		if (settings.embeddingModelId && settings.embeddingModelId.trim() !== '') {
+			try {
+				this.embeddingModel = getEmbeddingModel(settings)
+			} catch (error) {
+				console.warn('Failed to initialize embedding model:', error)
+				this.embeddingModel = null
+			}
+		} else {
+			this.embeddingModel = null
+		}
 	}
 
 	async initializeDimension(): Promise<void> {
diff --git a/src/settings/components/ProviderModelsPicker.tsx b/src/settings/components/ProviderModelsPicker.tsx
index 4879b76..a43c9ac 100644
--- a/src/settings/components/ProviderModelsPicker.tsx
+++ b/src/settings/components/ProviderModelsPicker.tsx
@@ -286,7 +286,7 @@ export const ComboBoxComponent: React.FC<ComboBoxComponentProps> = ({
 
 		if (isValidProvider(newProvider)) {
 			setModelProvider(newProvider);
-			// 当提供商变更时，清空模型选择并通知父组件
+			// 当提供商变更时，清空模型选择让用户重新选择
 			updateModel(newProvider, '', false);
 		}
 	};