app.py

#!/usr/bin/env python

import gradio as gr

with gr.Blocks() as demo:
    with gr.Tabs():
        with gr.Tab(label="a"):
            out1 = gr.Model3D(value="data.ply")
        with gr.Tab(label="b"):
            out2 = gr.Model3D(value="data.ply")

if __name__ == "__main__":
    demo.queue().launch()