25% -- preference flip rate for LLM-based rerankers (2025)

Name: Preference Flip Rate Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-30

2025 · resollm.ai

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Attribution: resollm.ai View source

Lighthouse Research Team

Last verified: 2026-09-30 · How we verify data →

Source verified Evidence graded

Value

25%

Unit

Percentage

Data Vintage

2025

Entity

LLM-based rerankers

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

resollm.ai Primary Tier B

https://resollm.ai/blog/do-llms-favor-recent-content/ ↗

Confidence: 53/100 Vintage: 2025 Channel: Deep Crawl

Source Article

Do Large Language Models Favor Recent Content?

Two search results that say the same thing. Same wording. Same meaning. The only difference is that one looks “newer” because it has a recent-looking date at the top. Researchers recently tested whether that single cue is enough to sway large language models. They took identical passages and changed…

Original Research

resollm.ai · Original study ↗

Methodology

Side-by-side pairwise relevance tests with identical passages differing only in date

Methodology documented

Segmentation

Industrymarketing

Cite this stat

Plain Text

LLM-based rerankers: 25% preference flip rate. Source: resollm.ai (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/llm-preference-flip-25-percent

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<blockquote cite="https://lighthousedata.io/data/llm-preference-flip-25-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>25%</strong> -- preference flip rate for LLM-based rerankers<br><small>Source: resollm.ai (2025) · <a href="https://lighthousedata.io/data/llm-preference-flip-25-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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