diff --git a/src/Service/FastWiki.Service/Options/OpenAIOption.cs b/src/Service/FastWiki.Service/Options/OpenAIOption.cs
index d010b4f7a9127b6185ad38705b11f5955524637e..c834f9ceeb8d85188f42706cd6588fed6f80e4bd 100644
--- a/src/Service/FastWiki.Service/Options/OpenAIOption.cs
+++ b/src/Service/FastWiki.Service/Options/OpenAIOption.cs
@@ -14,6 +14,11 @@ public class OpenAIOption
     /// </summary>
     public static string EmbeddingEndpoint { get; set; }
 
+    /// <summary>
+    /// 对话模型的 ChatModel
+    /// </summary>
+    public static string ChatModel { get; set; }
+
     /// <summary>
     /// 对话模型的 API Key
     /// </summary>
diff --git a/src/Service/FastWiki.Service/Service/WikiMemoryService.cs b/src/Service/FastWiki.Service/Service/WikiMemoryService.cs
index 8e3adc410d12b34a0f7bd9b2249a1f47e946f36c..6ec40b73420d04c212e24d10a420d1b95af87544 100644
--- a/src/Service/FastWiki.Service/Service/WikiMemoryService.cs
+++ b/src/Service/FastWiki.Service/Service/WikiMemoryService.cs
@@ -147,7 +147,7 @@ public sealed class WikiMemoryService : ISingletonDependency
                 .WithOpenAITextGeneration(new OpenAIConfig()
                 {
                     APIKey = OpenAIOption.ChatToken,
-                    TextModel = model ?? string.Empty
+                    TextModel = model ?? OpenAIOption.ChatModel
                 }, null, new HttpClient(HttpClientHandler))
                 .WithOpenAITextEmbeddingGeneration(new OpenAIConfig()
                 {