reducing chunk size

app.py

@@ -16,7 +16,7 @@ import gradio as gr
 from typing import List, cast, Optional
 
 service_context = ServiceContext.from_defaults(
-    chunk_size=1024,
+    chunk_size=512,
     llm=OpenAI(model="gpt-4"),
     embed_model=OpenAIEmbedding(),
     system_prompt="""