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Test-time scaling (TTS) has been shown to improve the performance of large language models (LLMs) by sampling and aggregating diverse reasoning paths. However, existing research has overlooked a critical issue: selection bias of reasoning…

Artificial Intelligence · Computer Science 2025-09-24 Zongqian Wu , Baoduo Xu , Tianyu Li , Zhu Sun , Xiaofeng Zhu , Lei Feng

Reward Modeling is critical in evaluating and improving the generation of Large Language Models (LLMs). While numerous recent works have shown its feasibility in improving safety, helpfulness, reasoning, and instruction-following ability,…

Computation and Language · Computer Science 2025-11-13 Hanning Zhang , Juntong Song , Juno Zhu , Yuanhao Wu , Tong Zhang , Cheng Niu

In aligning large language models (LLMs), reward models have played an important role, but are standardly trained as discriminative models and rely only on labeled human preference data. In this paper, we explore methods that train reward…

Computation and Language · Computer Science 2026-01-27 Chenglong Wang , Yang Gan , Yifu Huo , Yongyu Mu , Qiaozhi He , Murun Yang , Bei Li , Tong Xiao , Chunliang Zhang , Tongran Liu , Jingbo Zhu

We empirically characterize the performance of discriminative and generative LSTM models for text classification. We find that although RNN-based generative models are more powerful than their bag-of-words ancestors (e.g., they account for…

Machine Learning · Statistics 2017-05-29 Dani Yogatama , Chris Dyer , Wang Ling , Phil Blunsom

Existing large language model (LLM)-based embeddings typically adopt an encoder-only paradigm, treating LLMs as static feature extractors and overlooking their core generative strengths. We introduce GIRCSE (Generative Iterative Refinement…

Computation and Language · Computer Science 2026-02-09 Yu-Che Tsai , Kuan-Yu Chen , Yuan-Chi Li , Yuan-Hao Chen , Ching-Yu Tsai , Shou-De Lin

Reinforcement learning (RL) has been effective for post-training autoregressive (AR) language models, but extending these methods to diffusion language models (DLMs) is challenging due to intractable sequence-level likelihoods. Existing…

Fine-tuning large language models (LLMs) is intended to improve their reasoning capabilities, yet we uncover a counterintuitive effect: models often forget how to solve problems they previously answered correctly during training. We term…

Artificial Intelligence · Computer Science 2025-05-27 Yuetai Li , Zhangchen Xu , Fengqing Jiang , Bhaskar Ramasubramanian , Luyao Niu , Bill Yuchen Lin , Xiang Yue , Radha Poovendran

Evaluating generative models, such as large language models (LLMs), commonly involves question-answering tasks where the final answer is selected based on probability of answer choices. On the other hand, for models requiring reasoning, the…

Computation and Language · Computer Science 2025-10-17 Hwiyeol Jo , Joosung Lee , Jaehone Lee , Sang-Woo Lee , Joonsuk Park , Kang Min Yoo

Feature selection aims to identify the most pattern-discriminative feature subset. In prior literature, filter (e.g., backward elimination) and embedded (e.g., Lasso) methods have hyperparameters (e.g., top-K, score thresholding) and tie to…

Machine Learning · Computer Science 2024-03-07 Wangyang Ying , Dongjie Wang , Haifeng Chen , Yanjie Fu

Inference-time scaling via repeated sampling has shown promise in reasoning tasks, but its effectiveness in multilingual generation remains underexplored. We evaluate this approach using perplexity- and reward-based verifiers on two…

Computation and Language · Computer Science 2025-05-29 Ashim Gupta , Vivek Srikumar

Although foundational vision-language models (VLMs) have proven to be very successful for various semantic discrimination tasks, they still struggle to perform faithfully for fine-grained categorization. Moreover, foundational models…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Soumitri Chattopadhyay , Sanket Biswas , Emanuele Vivoli , Josep Lladós

While scaling laws for large language models (LLMs) during pre-training have been extensively studied, their behavior under reinforcement learning (RL) post-training remains largely unexplored. This paper presents a systematic empirical…

Inference-time scaling has emerged as a powerful way to improve large language model (LLM) performance by generating multiple candidate responses and selecting among them. However, existing work on dynamic allocation for test-time compute…

Machine Learning · Computer Science 2025-09-15 Jenny Y. Huang , Mehul Damani , Yousef El-Kurdi , Ramon Astudillo , Wei Sun

Generative recommendation models can model user behavior as sequences of events and provide a shared backbone for multiple recommendation tasks. In production, however, pre-training gains do not automatically translate into downstream…

Information Retrieval · Computer Science 2026-05-25 Qiuling Xu , Ko-Jen Hsiao , Moumita Bhattacharya

Although deep neural networks are effective on supervised learning tasks, they have been shown to be brittle. They are prone to overfitting on their training distribution and are easily fooled by small adversarial perturbations. In this…

Machine Learning · Computer Science 2020-10-07 Laëtitia Shao , Yang Song , Stefano Ermon

An AI system for professional floor plan design must precisely control room dimensions and areas while respecting the desired connectivity between rooms and maintaining functional and aesthetic quality. Existing generative approaches focus…

Computation and Language · Computer Science 2026-05-15 Luis Lara , Aristides Milios , Zhi Hao Luo , Aditya Sharma , Ge Ya Luo , Christopher Beckham , Florian Golemo , Christopher Pal

In this work, we investigate how small language models (SLMs) can be scaled to support multimodal search and recommendation use cases while remaining efficient enough for real-time, resource-constrained deployments. We present a framework…

Computation and Language · Computer Science 2025-12-04 Yu-Chen Lin , Sanat Sharma , Hari Manikandan , Jayant Kumar , Tracy Holloway King , Jing Zheng

Achieving faster execution with shorter compilation time can enable further diversity and innovation in neural networks. However, the current paradigm of executing neural networks either relies on hand-optimized libraries, traditional…

Machine Learning · Computer Science 2019-05-31 Byung Hoon Ahn , Prannoy Pilligundla , Hadi Esmaeilzadeh

Social goods, such as healthcare, smart city, and information networks, often produce ordered event data in continuous time. The generative processes of these event data can be very complex, requiring flexible models to capture their…

Machine Learning · Computer Science 2020-12-29 Shuang Li , Shuai Xiao , Shixiang Zhu , Nan Du , Yao Xie , Le Song

Large Language Models (LLMs) are increasingly used to generate synthetic textual data for training smaller specialized models. However, a comparison of various generation strategies for low-resource language settings is lacking. While…

Computation and Language · Computer Science 2025-09-22 Tatiana Anikina , Jan Cegin , Jakub Simko , Simon Ostermann