Generative recommendation models promise to unify the traditionally fragmented pipeline of retrieval, ranking, and scoring, but current implementations often fall short due to flat semantic representations and reliance on externally constructed chain-of-thought (CoT) data. A new paper proposes HoloRec (Holistic Encoding and Interleaved Reasoning for Generative Recommendation), which addresses these issues by embedding reasoning directly into the generation process.
The Problem with Existing Generative Recommenders
According to the arXiv preprint (2026), existing generative recommendation models suffer from two key weaknesses: they lack hierarchical structure for multi-step reasoning, and their CoT mechanisms depend on expensive, manually annotated data that remains disconnected from the generation objective. This results in suboptimal performance, particularly in data-sparse environments common in enterprise settings.
HoloRec Architecture: Endogenous Chain-of-Thought
HoloRec introduces an endogenous CoT recommendation mechanism. It constructs a hierarchical semantic encoding matrix using multi-granularity nested residual quantization, optimized by a holistic reconstruction loss. This unified representation, reasoning, and generation approach eliminates the need for external CoT data.
The model operates in two inference modes:
- Non-thinking mode: uses lightweight multi-granularity supervised alignment for fast predictions.
- Thinking mode: employs an interleaved reasoning scheme that generates CoT steps on the fly.
The thinking mode achieves higher accuracy with only modest inference overhead, according to the authors.
Experimental Results
Experiments on multiple public recommendation datasets show that HoloRec consistently outperforms baselines, with especially significant gains in sparse scenarios. The paper reports that the thinking mode delivers better accuracy than the non-thinking mode while maintaining reasonable computational cost.
| Mode | Key Characteristic | Accuracy | Inference Overhead |
|---|---|---|---|
| Non-thinking | Multi-granularity alignment | Fast prediction | Low |
| Thinking | Interleaved reasoning | Higher accuracy | Modest |
Implications for Enterprise Recommendation Systems
For technology leaders evaluating next-generation recommendation platforms, HoloRec demonstrates that endogenous reasoning can replace costly manual annotation pipelines. While the paper focuses on public datasets, the architecture could be adapted for enterprise scenarios such as product recommendations on e-commerce platforms or content personalization.
About the Research
The paper was authored by a team including Shuqi Zhao, Jingsong Su, Xiang Liu, Xingzhi Yao, Yiming Qiu, Huimu Wang, Liang Lin, Pengbo Mo, Dai Mingming, Jiao Han, Jizhong, and Songlin. It is available on arXiv under identifier 2606.15331.
