ResearchResearch paperLarge Language Models · Reinforcement Learning1 source · Oct 15, 2026

Agentic-Priors: Using Large Language Models to Address the Cold Start Problem in Preference Elicitation

To address this, we present Agentic-Priors, which lets agentic systems use the implicit knowledge of large language models (LLMs) instead.

Key points

  • An agent that learns a user's preferences from their choices faces a cold start problem: before any choices are observed, it must rely solely on a prior.
  • Informative priors are usually fitted to historical choice data, which new tasks and deployments lack.
  • This prior is then refined by a Bayesian learner as choices are observed.
  • Across seven choice datasets, Agentic-Priors improves cold start accuracy over an uninformed prior by 5-40 percentage points.

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Before this

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