Has anyone used default AI models for classifying contacts into persona buckets?

I wonder if anyone here has been using any of the default ai models to help with classification work? I wanted to try Jev, but not sure we can get that passed internally right now. but i have around 200k contacts i want to categorise into persona buckets. given most of the models inside clay are more than a credit each this is not cost effective. When I use clay's own map job title to persona tool its hit and miss as job titles are so varied