Update app.py

- Fix Defaults

app.py

@@ -11,14 +11,14 @@ def respond(message, history, token, model, system_message, max_tokens, temperat
     
     # Default model selection logic
     if not token:
-        model = "gpt2"  # Default public model that doesn't require token
+        model = "HuggingFaceH4/zephyr-7b-beta"  # Default public model that doesn't require token
         try:
             client = InferenceClient(model=model)
         except Exception as e:
             yield f"Error initializing client: {str(e)}"
             return
     else:
-        model = model or "meta-llama/Llama-3.1-8B-Instruct"  # Default private model
+        model = model or "HuggingFaceH4/zephyr-7b-beta"  # Default private model
         try:
             client = InferenceClient(model=model, token=token)
         except Exception as e: