AI has officially 'maxed out' the LSAT, hitting the ceiling of what the gold-standard test of human logic was designed to measure.
April 14, 2026
Original Paper
AI Achieves a Perfect LSAT Score
arXiv · 2604.10034
The Takeaway
Achieving a perfect score on an official, disclosed Law School Admission Test indicates that LLMs have reached the upper bound of the cognitive capacities these benchmarks were built for. This signals a transition from evaluating LLM logic to needing entirely new, more complex reasoning benchmarks.
From the abstract
This paper reports the first documented instance of a language model achieving a perfect score on an officially disclosed Law School Admission Test (LSAT). Controlled experiments on eight reasoning models show that varying the prompt, shuffling answer choices, and sampling multiple responses have no meaningful effect as drivers of performance. Ablating the thinking phase that models generate before answering, however, lowers frontier accuracy by up to 8 percentage points, predominantly in logica