@Ahmed Alaa Apologies for the late reply. I have got an update from the Product Group.
We re-enabled "gpt-4 vision preview" in Sweden Central, West US and Japan East.
Switzerland North is way overloaded so we aren’t able to accept any more traffic at this time. I am still waiting for the status about Australia East region. I will keep you posted. .
Please accept our sincere Apologies for the inconvenience caused due to this issue.
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