humans& launches &Tutor AI, trained by teaching a simulated human learner model

humans& has released Ampersand Tutor (&Tutor), an AI tutor trained by teaching a simulated human learner model called Persimmon. The company says &Tutor performed best on a widely-used tutor model evaluation. When Persimmon was swapped for another learner model, the gains could not be reproduced, which the company presents as evidence that better models of people help build better AI for people. The company reports that in extensive evaluations, Persimmon behaved more like human learners across conversational moves, affect, and error rates. &Tutor is available through the company's agent API, with access open to everyone.

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