app.py

import gradio as gr 
from gradio.mix import Parallel 

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

model1=gr.Interface.load("huggingface/EleutherAI/gpt-j-6B")
model2=gr.Interface.load("huggingface/gpt2")
model3=gr.Interface.load("huggingface/EleutherAI/gpt-neo-125M")

gr.Parallel(model1 , model2 , model3 , title=title, description=description).launch()