I have the same problem.
Calling gpt-4o-mini deployment endpoint for /chat/completions yields the same error.
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i have deployed gpt-4o-mini onto my account but when i try and call openai.chat.completions.create i receive the following error (gpt3.5 and gpt4 variants work perfectly, the openai model also works out of the box).
Error: 400 The chatCompletion operation does not work with the specified model, gpt-4o-mini. Please choose different model and try again. You can learn more about which models can be used with each operation here: https://go.microsoft.com/fwlink/?linkid=2197993.
I have the same problem.
Calling gpt-4o-mini deployment endpoint for /chat/completions yields the same error.
Make sure you didn't deploy de model as "Global-Batch". It has to be "Global-Standard" (or Provisioned if you have it)