This is increasingly being suggested as a solution to the critical lack of teachers, particularly at secondary school.
My general position is that we saw how pupils are not motivated to learn when left to their own devices at home over lockdown. As a teacher, a lot of my day is spent getting kids to do the work, in various ways.
This blog by Becky Allen "Will students feel motivated to work for the AI-masters?' is an interesting discussion of the issue. It refers to Animal Crossing making you feel guilty for neglecting your characters, the Duolingo owl encouraging you to keep a streak and so on. Personally, I find closing the rings on my Apple Watch the only thing that has motivated me to do regular exercise.
But what these things all have in common is that they are things that the student has opted into in the first place. Presumably there was some initial motivation on their part that just needs a nudge to keep going.
An important part of teaching is building relationships with the pupils on a human level. Can a student build a relationship with an AI? Well, definitely. But on a widespread enough scale for it to be more effective than humans interaction? Not sure.
However, would it be better than no teacher? Most likely.
https://rebeccaallen.co.uk/2024/01/13/artificial-incentives-will-students-feel-motivated-to-work-for-their-ai-masters/