I've been a Kagi Pro user for several years now, and to be honest, the models from the pro tier aren't that useful compared to the free versions of Gemini & ChatGPT.

For me, I pay for Kagi pro for search without Google/Bing enshittification, their Translate (which I use quite often while I'm learning German/working in German - better for me than Google Translate), and their Summarizer. I pay for Claude, and also occasionally use OpenRouter for my AI needs.