A recent randomized controlled trial conducted by the World Bank in Nigeria demonstrated that using a GPT-4-based AI tutor with teacher guidance in a six-week after-school program produced learning gains more than twice as large as some of the most effective educational interventions, at a very low cost. The study highlights the potential of AI-assisted education, particularly when combined with instructor support, to significantly enhance student outcomes. Additional research involving 6,960 students across four universities found that while students appreciate the accessibility and immediacy of generative AI feedback, they continue to trust teacher feedback more, suggesting that AI and educators serve complementary roles in learning. Comparative evaluations of state-of-the-art AI models in educational contexts identified Gemini 2.5 Pro as a leading performer. Overall, emerging evidence points to the promise of AI tutors in improving education, although caution remains about AI used without teacher involvement, which may encourage shortcuts that hinder learning.