# Source Preference in the Wild: How LLM Agents Favor Items by Source, and How to Reduce It > Source: > Published: 2026-10-05 03:00:09+00:00 As LLM agents decide on users' behalf which product to buy, which hotel to book, or which paper to cite, a preference for items from certain sources (the sites or services they come from) shapes what users receive and which sources are selected. We study source preference in end-to-end search with 1