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arXiv

Suan builds the preference-optimization objective directly at the gradient level, achieving stronger safety alignment while preserving response utility across baselines and benchmarks

The work introduces Suan, a new preference optimization algorithm whose objective is formulated directly at the gradient level, bypassing the standard variational derivation and yielding more interpretable and robust training dynamics; extensive evaluations across a diverse suite of competitive baselines and benchmarks show Suan achieves superior safety alignment while fully preserving response utility.