Update app.py

app.py

@@ -73,7 +73,7 @@ class GeminiHandler(AsyncStreamHandler):
 
         client = genai.Client(
             api_key=api_key or os.getenv("GEMINI_API_KEY"),
-            http_options={"api_version": "v1alpha"},
+            http_options={"api_version": "v1beta"},
         )
 
         # Define the tools and system instruction
@@ -100,7 +100,7 @@ class GeminiHandler(AsyncStreamHandler):
         )
         
         async with client.aio.live.connect(
-            model="gemini-2.5-flash-live-preview", config=config
+            model="gemini-2.5-flash-native-audio-preview-12-2025", config=config
         ) as session:
             async for audio in session.start_stream(
                 stream=self.stream(), mime_type="audio/pcm"