Frontier LLMs Get 2 of 3 Tax Returns Wrong - Stop Letting Them Decide

Everyone is wiring LLMs into checkout flows right now. I want to make the unpopular case that for the decisions which actually move money - tax, discounts, eligibility, pricing - the model should never have the final say. Not because the models are bad, but because I have the benchmark data showing exactly what happens when they do, and a pattern that fixes it without throwing the LLM out. Here is the evidence, the one condition where it falls apart, and where it pays off. TL;DR. The common…