@ecaglar Thanks for reaching out. I tried to deploy gpt-4 model at my end and am able to reproduce the same error in East US region.
Due to high demand, availability is limited in the East US region. If you're trying with East US region, as a workaround try deploying the service to another region like East Canada etc.. listed in the below table:
or to increase the quota, you need to fill the below form and wait for the approval:
https://aka.ms/oai/quotaincrease Additionally, there is no guarantee that your request will be approved for an application.
Hope this help! Do let me know incase of further queries, I would be happy to assist you.