When and How Human Curation Backfires: Preference Alignment under Multi-Model Self-Consuming Loop
- URL: http://arxiv.org/abs/2605.29267v1
- Date: Thu, 28 May 2026 02:36:57 GMT
- Title: When and How Human Curation Backfires: Preference Alignment under Multi-Model Self-Consuming Loop
- Abstract summary: Self-consuming training can lead to model collapse, divergence, or bias amplification.<n>Recent work shows that incorporating human curation into the loop can steer a self-consuming model toward human-aligned behavior.<n>This paper studies self-consuming training in the multi-model regime.
- Score: 13.054822893327058
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Foundation models are increasingly trained on synthetic data generated by prior model iterations rather than exclusively on real data. This self-consuming training paradigm can lead to model collapse, divergence, or bias amplification. Recent work (Ferbach et al., 2024) shows that incorporating human curation into the loop can steer a self-consuming model toward human-aligned behavior, but these analyses focus on a single, isolated model that solely consumes its own outputs. In practice, however, models often interact and train on input-output pairs produced by other models. This paper studies self-consuming training in the multi-model regime. We first formalize a framework for interacting self-consuming models and characterize when the resulting dynamical system converges to a stable point. We then examine how human curation of one model affects its own alignment (self-influence) and how such effects propagate to other models (cross-influence). Unlike isolated settings where human curation always enhances model alignment, we show that cross-model interactions can dampen or even invert this effect, ultimately degrading long-term alignment.
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