diff --git a/src/Infrastructure/BotSharp.OpenAPI/Controllers/InstructModeController.cs b/src/Infrastructure/BotSharp.OpenAPI/Controllers/InstructModeController.cs
index a884fd7e..45120a26 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/Controllers/InstructModeController.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/Controllers/InstructModeController.cs
@@ -83,7 +83,8 @@ public class InstructModeController : ControllerBase
 
         try
         {
-            var completion = CompletionProvider.GetChatCompletion(_services, provider: "openai", modelId: "gpt-4", multiModal: true);
+            var completion = CompletionProvider.GetChatCompletion(_services, provider: input.Provider ?? "openai",
+                modelId: input.ModelId ?? "gpt-4", multiModal: true);
             var message = await completion.GetChatCompletions(new Agent()
             {
                 Id = Guid.Empty.ToString(),