LLM Essay Feedback at Near-Instructor Parity
#1Multiple peer-reviewed studies published in 2023-2024 (including work in Computers & Education and Assessment & Evaluation in Higher Education) find that students rate LLM-generated essay feedback as equally or more helpful than instructor feedback on structural and grammatical dimensions, and only marginally less helpful on argument development. Turnitin's Feedback Studio, EssayGrader, and Grammarly Premium are now deployed at thousands of institutions, providing rubric-aligned feedback at scale. The cost differential is stark: AI feedback costs cents per essay versus $40-80 per hour of instructor time.