app.py

import gradio as gr
from gradio.mix import Parallel

title = "My First Text Generator"
description = "input text and submit."

model1=gr.Interface.load("huggingface/EleutherAI/gpt-neo-1.3B")
model3=gr.Interface.load("huggingface/EleutherAI/gpt-neo-2.7B")

gr.Parallel(model1 , model3, title=title,description=description).launch()