Update app.py

app.py

@@ -4,10 +4,11 @@ import os
 from transformers import AutoModelForCausalLM, AutoTokenizer, pipeline
 
 # ---- Hugging Face model: use a public chat/instruct model ----
-model_id = "HuggingFaceH4/zephyr-7b-beta"  # You can use another public instruct/chat model if you prefer
-tokenizer = AutoTokenizer.from_pretrained(model_id)
-model = AutoModelForCausalLM.from_pretrained(model_id)
-llm = pipeline("text-generation", model=model, tokenizer=tokenizer)
+model_id = "google/flan-t5-base"
+from transformers import pipeline
+llm = pipeline("text2text-generation", model=model_id)
+# (Update llm call in your code accordingly)
+
 
 # --- SAP Sales Order Header tool ---
 def fetch_sales_order_headers():