Advancing Relevance Measurement with Vision-Language Models for Web-Scale Search
On the map: Multimodal LLMs / vision-language models → Document understanding and multimodal RAG
Abstract (arXiv)
Relevance evaluation plays a crucial role in personalized search systems, serving as a guardrail alongside user engagement metrics to ensure that search results align with user queries and intent. While human annotation is the traditional method for relevance evaluation, its high cost and long turnaround time limit its scalability. In this work, we present a VLM-based automated relevance evaluation pipeline deployed within Pinterest Search for online A/B experiments. We rigorously validate the alignment between VLM-generated judgments and human annotations, demonstrating that VLMs can provide reliable relevance measurement for experiments while greatly improving the evaluation efficiency. Leveraging VLM-based labeling further unlocks opportunities to expand the query set, optimize sampling design, and efficiently assess a wider range of search experiences at scale. This approach leads to higher-quality relevance metrics and significantly reduces the Minimum Detectable Effects (MDEs) in online experiment measurements.
Key facts. No citing papers in the map yet (data through 7 Oct 2026). Placed in Document understanding and multimodal RAG, one of 16 directions in Multimodal LLMs / vision-language models. Builds on 13 of its 30 references that are in the map. First posted on arXiv 3 Aug 2026.
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References · 13
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- 2024Can We Use Large Language Models to Fill Relevance Judgment Holes?cited by 17
- 2025Benchmarking LLM-based Relevance Judgment Methodscited by 14
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- 2024A Large-Scale Study of Relevance Assessments with Large Language Models: An Initial Look
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- 2026Completing Missing Annotation: Multi-Agent Debate for Accurate and Scalable Relevant Assessment for IR Benchmarks
- 2024Evaluating Cost-Accuracy Trade-offs in Multimodal Search Relevance Judgements