Can not get access to custom model using API

Hello everyone!
I try to use model from GPT store via API. The name of model is “PDF Reader” and gizmo_id is g-OJWqJKLiE.

I have this error: “The model g-OJWqJKLiE” does not exist or you do not have access to it."

I checked available models at my account with this Python code:

import openai
openai.api_key = 'my-api-key'
models = openai.models.list()
print(models)

There is no needed model in the list of available models.

Also I can not find needed model in openai.com\playground

My question is “How to get access to needed model?”. Maybe I have to buy subscription?