Best for: Write
ChatGPT
The best-known AI chat assistant: ask anything, get a written answer.
Best for: Understand topics, notes and sources faster.
Khan Academy's AI tutor that guides you instead of giving answers.
Khanmigo is an AI tutor and teaching assistant from the non-profit Khan Academy. It nudges learners towards the answer step by step, and helps teachers plan lessons.
Free for teachers only; learners and parents pay.
Teachers can sign up for free. Khanmigo's site says a payment is required for parents and learners.
Source: Khanmigo's own pricing page, checked Nov 2026. Plans change; confirm before you pay.
Best for: Write
The best-known AI chat assistant: ask anything, get a written answer.
Best for: Study & research
An AI search engine that answers with sources you can click.
Best for: Write
A careful, clear AI writing and thinking partner from Anthropic.