If I am using this for my model, what version of gpt-4 does this default to? For example, there are GPT 4.1, GPT 4.1 mini, etc etc in the dropdown menu of choosing OpenAI models for your assistant in the vapi dashboard https://cdn.discordapp.com/attachments/1211484481848873020/1391509412467839266/image.png?ex=686c27a0&is=686ad620&hm=8916ea570c0770d109c172619be029d160b27591a028bd30a0ff4fc7c5096906&