Update app.py

app.py

@@ -52,7 +52,7 @@ def respond(
     
     try:
         stream = selected_client.chat.completions.create(
-            model=AVAILABLE_MODELS[model_choice][model_name],
+            model=AVAILABLE_MODELS[model_choice]["model_name"],
             messages=messages,
             max_tokens=max_tokens,
             temperature=temperature,