Where to Go Next for Recommender Systems? ID- vs. Modality-based Recommender Models Revisited
Open accessAbstract
Recommendation models that utilize unique identities (IDs for short) to represent distinct users and items have been state-of-the-art (SOTA) and dominated the recommender systems (RS) literature for over a decade. Meanwhile, the pre-trained modality encoders, such as BERT [9] and Vision Transformer [11], have become increasingly powerful in modeling the raw modality features of an item, such as text and images. Given this, a natural question arises: can a purely modality-based recommendation model (MoRec) outperforms or matches a pure ID-based model (IDRec) by replacing the itemID embedding with a SOTA modality encoder? In fact, this question was answered ten years ago when IDRec beats MoRec by a strong margin in both recommendation accuracy and efficiency.
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Using only textual features as inputs to recommendation models, leveraging pre-trained language models, can alleviate cold-start problems and enable cross-domain recommendations.
“Additionally, some recent works [114-117] have explored using only textual features as inputs to recommendation models, leveraging pre-trained language models to alleviate coldstart problems and enable cross-domain recommendations.”
From When large language models meet personalization: perspectives of challenges and opportunities (2024) · cites this paper as [117]
LLM-Embedding-Based Recommenders use embeddings from LLMs in traditional systems to capture user preferences.
“LLM-Embedding-Based Recommenders use embeddings from LLMs in traditional systems to capture user preferences (Yuan et al., 2023; Xi et al., 2024a).”
From Decoding in Latent Spaces for Efficient Inference in LLM-based Recommendation (2025) · cites this paper as Yuan et al., 2023
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References 47 · Cited by 200
- Authors
- Yuan, Z., Yuan, F., Song, Y., Li, Y., Fu, J., Yang, F., Pan, Y., & Ni, Y.
- Affiliations
- Westlake University (CN)
- Zhejiang Lab (CN)
- Venue
- Proceedings of the 46th International ACM SIGIR Conference on Research and Development in Information Retrieval
- Publisher
- ACM
- Published
- 2023-07-18
- Pages
- 2639-2649
- OpenAlex
- W4384648324
- Cited by
- 200
- References
- 47
- Citations by year
- 2026: 61 · 2025: 72 · 2024: 59 · 2023: 8
- FWCI
- 51.44
- Type
- conference paper
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR) (publishedVersion, cc-by)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- the Research Center for Industries of the Future (No.WU2022C030)
- the Key Research Project of Zhejiang Lab (No.2022PG0AC02)
- Topics
- Physical Sciences › Computer Science › Information Systems › Recommender Systems and Techniques
- Physical Sciences › Computer Science › Information Systems › Information Retrieval and Search Behavior
- Social Sciences › Decision Sciences › Management Science and Operations Research › Advanced Bandit Algorithms Research
- Keywords
- recommender systems, item embeddings, BERT, vision transformer, user and item representations, recommendation efficiency
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