Hi @Khalid Dhieb ,
As mentioned in the documentation, there are limited availability of GPT-4 models in East US and France Central region, and this could be preventing you from deploying a new GPT-4 model in East US.
I suggest you to please check your other GPT-4 models and regions which is currently showing available in the above list like Canada East etc. Sorry for the inconvenience this has caused you.
Please let me know if you have any other questions.
Thanks
Saurabh
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