PEFT How to use SouthMemphis/fred-4 with PEFT:
from peft import PeftModel
from transformers import AutoModelForSeq2SeqLM
base_model = AutoModelForSeq2SeqLM.from_pretrained("ai-forever/FRED-T5-1.7B")
model = PeftModel.from_pretrained(base_model, "SouthMemphis/fred-4") 
