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Models also show non-additive intensity anchoring, bounded foundation-specific residuals after component control, and highly conv","title":"Every Act Has Its Price: Compressed Moral Composition in Frontier LLMs","url":"https://arxiv.org/abs/2606.11232","vendor":"arxiv_cs_ai"},"summary":"arXiv:2606.11232v1 Announce Type: cross \nAbstract: Existing LLM moral benchmarks usually ask which isolated moral act, value, or foundation a model prefers. This is useful but incomplete. Realistic judgments often require a model to combine several moral signals within the same option. We introduce **Moral Trolley Arena**, a two-stage blind ELO benchmark for measuring how LLMs compose moral evidence. The single-scene arena first calibrates individual moral acts from a 229-scenario corpus across five Moral Foundations Theory foundations; the composite arena then combines calibrated acts into two-act moral items over a controlled intensity grid and measures the resulting composite preferences. 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