Update app.py

app.py

@@ -26,6 +26,8 @@ model = YOLO("best.pt")
 openai_api_key = os.environ.get("openai_api_key")
 MAX_FILE_SIZE = 50 * 1024 * 1024  # 50MB
 
+llm = ChatOpenAI(model="gpt-3.5-turbo", api_key=openai_api_key, temperature=0.3)
+
 # Utility functions
 @st.cache_data(show_spinner=False, ttl=3600)
 def clean_text(text):
@@ -181,7 +183,7 @@ def add_interactive_citations(summary_text, source_chunks):
 @handle_errors
 def qa_pdf(_pdf_file_path, query, num_clusters=5):
     embeddings_model = OpenAIEmbeddings(model="text-embedding-3-small", api_key=openai_api_key)
-    llm = ChatOpenAI(model="gpt-4", api_key=openai_api_key, temperature=0.3)
+#    llm = ChatOpenAI(model="gpt-3.5-turbo", api_key=openai_api_key, temperature=0.3)
     
     # Load PDF with page numbers
     loader = PyMuPDFLoader(_pdf_file_path)