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cs.IR2026

Preserving Item Semantics for Free: Rethinking Token Initialization in LLM-Based Generative Recommendation

Donald Loveland, Liam Collins, Bhuvesh Kumar +2

Recent advances in generative recommendation (GR) leverage large language models (LLMs) as recommender backbones, enabling LLMs to directly generate recommendations conditioned on…

cs.IR2026

LLM-Based Generative Retrieval for Snapchat Content Recommendation

Liam Collins, Jiwen Ren, Donald Loveland +19

Pretrained large language models (LLMs) are promising retrieval engines because they combine rich semantic priors, strong sequence modeling capabilities, and favorable scaling beha…

cs.IR2026

On the Memorization Behavior of LLMs in Generative Recommendation: Observations, Implications, and Training Strategies

Sunwoo Kim, Sunkyung Lee, Clark Mingxuan Ju +5

Generative recommendation (GR) has emerged as a promising direction for recommender systems. Recently, large language models (LLMs) have been increasingly adopted for GR, as their…

cs.IR2026

Semantic IDs for Recommender Systems at Snapchat: Use Cases, Technical Challenges, and Design Choices

Clark Mingxuan Ju, Tong Zhao, Leonardo Neves +15

Effective item identifiers (IDs) are an important component for recommender systems (RecSys) in practice, and are commonly adopted in many use cases such as retrieval and ranking.…

cs.IR2025

Generative Recommendation with Semantic IDs: A Practitioner's Handbook

Clark Mingxuan Ju, Liam Collins, Leonardo Neves +4

Generative recommendation (GR) has gained increasing attention for its promising performance compared to traditional models. A key factor contributing to the success of GR is the s…

cs.IR2025

Learning Universal User Representations Leveraging Cross-domain User Intent at Snapchat

Clark Mingxuan Ju, Leonardo Neves, Bhuvesh Kumar +11

The development of powerful user representations is a key factor in the success of recommender systems (RecSys). Online platforms employ a range of RecSys techniques to personalize…