Grounded, not omniscientIt only knows what you gave it.
Most AI tutors know everything and cite nothing. This one only reads what your class contains. When it answers, it links to the page. When it can't, it says so — instead of inventing something plausible-sounding.
Always currentEvery upload joins the index.
PDFs are parsed page by page. Videos carry the questions attached to them. Quiz explanations get pulled in too. Change a source and the index rebuilds itself in the background — there's no button to press, because there shouldn't be one.
On a budgetMetered, so a busy class can't spend the day.
AI calls are budgeted per teacher; tutor chat and quiz generation share the same wallet. The app tells you when it's low — instead of failing halfway through a batch and leaving you to guess which parts landed.