Update app.py

app.py

@@ -125,7 +125,7 @@ def get_pdf_index():
 llm = ChatOpenAI(
     base_url="https://api.together.xyz/v1",
     api_key='0291f33aee03412a47fa5d8e562e515182dcc5d9aac5a7fb5eefdd1759005979',
-    model="meta-llama/Llama-3-70B-Instruct"
+    model="meta-llama/Llama-3.3-70B-Instruct-Turbo-Free"
 )
 
 # ----------------- تعریف SimpleRetriever -----------------