The Accuracy Cliff: Why LLMs Fail Complex Questions

Wonder why LLMs struggle with multi-step logic? A new paper from MBZUAI shows the Fano-style accuracy upper bound proves single-pass LLM reasoning collapses when task complexity exceeds output capacity.
Arxiv: https://arxiv.org/pdf/2509.21199
We break down the 'Accuracy Cliff' on GenAI learner.