Randomized trials find AI tutoring lifts student test scores while AI-written work gains fade

Ethan Mollick shares randomized trial results showing that access to AI raised student test scores, with gains persisting a week later when students used AI as a tutor but fading when AI wrote for them.

Mollick says the effects were positive across all experiments. The trials used the older GPT-4o model, and the findings come from Mollick's own account of the results rather than from the full study reports.