OptionGroup and caption layout

I am trying to get an optionGroup to have the labels next to them, on the right hand side like normal radio buttons in every other UI I have ever used, instead of underneath them. I do not see anything in the API regarding how to change the layout of this? Anyone point me in the correct direction?

The label on an option group is rendered as a label in html. It is in the v-select-option class, I would add to your css (Untested):

.v-select-option label{
   display: inline-block;
}