Update app.py

app.py

@@ -21,7 +21,7 @@ app = FastAPI()
 vqa_pipeline = pipeline("image-to-text", model="Salesforce/blip-vqa-base")
 code_generator = pipeline("text-generation", model="openai-community/gpt2-medium")
 table_analyzer = pipeline("table-question-answering", model="google/tapas-large-finetuned-wtq")
-qa_pipeline = pipeline("question-answering", model="deepset/roberta-base-squad2")  # ✅ FIXED MODEL
+qa_pipeline = pipeline("question-answering", model="google/flan-t5-large	")  # ✅ FIXED MODEL
 
 # ✅ Functions for Document & Image QA
 def extract_text_from_pdf(pdf_file):