Update app.py

app.py

@@ -168,7 +168,9 @@ def main(pinecone_index_name, chroma_collection_name, persist_directory, docsear
         r_pinecone = st.radio('Use Pinecone?', ('Yes', 'No'))
         r_ingest = st.radio(
             'Ingest file(s)?', ('Yes', 'No'))
-        r_llm = st.multiselect('LLM:',['gpt-3.5-turbo','gpt-4'],'gpt-3.5-turbo')
+        r_llm = st.multiselect(
+            'LLM:', ['gpt-3.5-turbo', 'gpt-4'], 'gpt-3.5-turbo')
+        r_llm = r_llm[0]
     with col2:
         OPENAI_API_KEY = st.text_input(
             "OpenAI API key:", type="password")