Ask HN: Looking for something like Khanmigo AI

What's the best Ai math tutoring product like khan academy's khanmigo? I love its product but it has limited use and I need more "battery" than they allow. So what's the sota math tutor LLM with unlimited usage? I need an ai math tutor. I can run locally. Have a laptop with a 30 series gpu or could run it remotely.

Is my best option install a local model or is there a service like khanmigo but with no limited battery feature?