app.py

import gradio as gr
from gradio.mix import Parallel

model1 = gr.Interface.load("huggingface/gpt2")
model2 = gr.Interface.load("huggingface/EleutherAI/gpt-j-6B")
model3 = gr.Interface.load("huggingface/EleutherAI/gpt-neo-1.3B")

gr.Parallel(model1, model2, model3).launch()