app.py

import gradio as gr
from gradio.mix import Parallel

title="My First Text Generator"
description="Input text."

model2=gr.Interface.load("huggingface/gpt2")
model3=gr.Interface.load("huggingface/EleutherAI/gpt-neo-125M")

gr.Parallel(model2,model3,title=title,description=description).launch()