GPT-4 API Timeout in a Python program with small tokens number

I’m sending GPT-4 a simple request (spelling and grammar correction) on a 1700 tokens input text

Chat GPT-4 interface works well
Playground GPT-4 works well
Python API using 3.5 Turbo works fine

But…Python API using GPT-4 retuns a timeout after 5 minutes. same code than above, same prompt, but MODEL=“GPT-4”

Am I the problem, or is there anything else (I have been approved for GPT-4 API use)