AI tutor matches expert humans at 1/918th the cost per learning gain
RachelVT42 · x · 2026-10-01
Citing Griswold's data, @RachelVT42 notes an AI tutor achieved learning gains equivalent to an expert human tutor at 918x lower cost per percentage point of learning gain — a full session including lesson planning, practice-problem creation, and one hour of interactive tutoring cost just $0.067. The author argues teacher unions fighting this are fighting a losing battle, suggesting they should fine-tune their own models instead, while insisting school choice and educational freedom are non-negotiable.
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