diff --git a/src/server/CookingApp/Infrastructure/Extensions/ServiceCollectionExtensions.cs b/src/server/CookingApp/Infrastructure/Extensions/ServiceCollectionExtensions.cs
index 92e00a27..7aa939d5 100644
--- a/src/server/CookingApp/Infrastructure/Extensions/ServiceCollectionExtensions.cs
+++ b/src/server/CookingApp/Infrastructure/Extensions/ServiceCollectionExtensions.cs
@@ -160,7 +160,7 @@ public static IHostApplicationBuilder AddOpenAIIntegration(this WebApplicationBu
         {
             string apiKey = builder.Configuration.GetValue<string>("OpenAIOptions:ApiKey") ?? string.Empty;
 
-            builder.Services.AddSingleton(new ChatClient(model: "gpt-4o", apiKey));
+            builder.Services.AddSingleton(new ChatClient(model: "gpt-5-mini-2025-08-07", apiKey));
             builder.Services.AddSingleton(new ImageClient(model: "dall-e-3", apiKey));
 
             builder.Services.AddScoped<IChatService, ChatService>();
@@ -191,4 +191,4 @@ public static IHostApplicationBuilder AddServices(this WebApplicationBuilder bui
             return builder;
         }
     }
-}
\ No newline at end of file
+}