Update app.py

app.py

@@ -167,11 +167,10 @@ def chat_response(
         # Initialize stream
         stream = co.chat_stream(
             #model='c4ai-aya-expanse-32b',
-            model='command-r-plus-08-2024',
+            model='command-r7b-arabic-02-2025',
             message=message,
             temperature=temperature,
             chat_history=chat_history,
-            prompt_truncation='AUTO',
             preamble=system_prompt
         )