Update app.py

app.py

@@ -2,6 +2,8 @@ from langchain_community.document_loaders import PyPDFLoader
 from langchain_community.llms.OpenAI import OpenAI 
 import gradio as gr
 from langchain.chains.summarize import load_summarize_chain
+from huggingface_hub import InferenceClient
+TEXT_MODEL_NAME = "google/gemma-3-270m"
 loader = PyPDFLoader("http://arxiv.org/pdf/2508.13246v1") 
 documents = loader.load()
 llm = OpenAI(temperature=0)
@@ -9,7 +11,7 @@ llm = OpenAI(temperature=0)
 def summarize_pdf (pdf_file_path, custom_prompt=""):
     loader = PyPDFLoader(pdf_file_path)
     docs = loader.load_and_split()
-    chain = load_summarize_chain(llm, chain_type="map_reduce")
+    chain = load_summarize_chain(TEXT_MODEL_NAME, chain_type="map_reduce")
     summary = chain.run(docs)
     
     return summary