Frontier model regret: belief loss on complex problems, optimization residual without reasoning

JessicaHullman · x · 2026-10-23

Thread follow-up: two patterns in frontier models — on more complex problems, regret is mostly belief loss; without reasoning mode, regret is mostly optimization residual, i.e., it's hard to get the model to optimize under the provided utility.

Related event: Northwestern paper decomposes LLM decision failures into belief loss and optimization residual(10 posts)→

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