app.py

import gradio as gr
from gradio .mix import Parallel

title="My First Text Generator"
description="Input text."
example=[
    ["Once upon a time"]
]

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()