Sarti Hugo Greetings & Welcome to Microsoft Q&A forum!
I understand that you have enough quota but still facing the issue. Are you seeing an issue with only GPT-4o model or all models in that region?
One possible reason for this error message could be that there is a limit on the number of deployments that can be created in a specific region. This limit may be different from the overall quota limit.
To resolve this issue, you can try creating the deployment in a different region. Alternatively, you can try deleting any unused deployments in the West US region to free up quota and then try creating the new deployment again.
Do let me know if you have any further queries.