Just thought I'd share the Custom Provider settings I used to successfully make calls to the x.ai Grok-2 API. It's fairly straight forward, except for the model name part. it displays as a dropdown, but you actually have to type the name (copy+paste won't work, you have to type it) and press enter.... same as adding an Additional Scope variable:
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Thanks for sharing how you solved this (and posting on the annoucement as well) 
For folks following along, we are tracking requests for a Grok Integration, but custom providers can solve for this in the meantime
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