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Long-context question answering (QA) over lengthy documents is critical for applications such as financial analysis, legal review, and scientific research. Current approaches, such as processing entire documents via a single LLM call or…

Databases · Computer Science 2026-03-19 Pramod Chunduri , Francisco Romero , Ali Payani , Kexin Rong , Joy Arulraj

Processing long contexts remains a challenge for large language models (LLMs) due to the quadratic computational and memory overhead of the self-attention mechanism and the substantial KV cache sizes during generation. We propose LLoCO, a…

Computation and Language · Computer Science 2024-10-18 Sijun Tan , Xiuyu Li , Shishir Patil , Ziyang Wu , Tianjun Zhang , Kurt Keutzer , Joseph E. Gonzalez , Raluca Ada Popa

In the continuously advancing AI landscape, crafting context-rich and meaningful responses via Large Language Models (LLMs) is essential. Researchers are becoming more aware of the challenges that LLMs with fewer parameters encounter when…

Computation and Language · Computer Science 2024-10-17 Somnath Banerjee , Amruit Sahoo , Sayan Layek , Avik Dutta , Rima Hazra , Animesh Mukherjee

Reliable evaluation of large language model (LLM)-generated summaries remains an open challenge, particularly across heterogeneous domains and document lengths. We conduct a comprehensive meta-evaluation of 14 automatic summarization…

Computation and Language · Computer Science 2026-04-29 Huyen Nguyen , Haoxuan Zhang , Yang Zhang , Junhua Ding , Haihua Chen

Extending context windows (i.e., Long Context, LC) and using retrievers to selectively access relevant information (i.e., Retrieval-Augmented Generation, RAG) are the two main strategies to enable LLMs to incorporate extremely long external…

Computation and Language · Computer Science 2025-01-06 Xinze Li , Yixin Cao , Yubo Ma , Aixin Sun

While Large Language Models (LLMs) are widely used in open-domain Question Answering (QA), their ability to handle inferential questions-where answers must be derived rather than directly retrieved-remains still underexplored. This study…

Computation and Language · Computer Science 2026-05-13 Jamshid Mozafari , Bhawna Piryani , Adam Jatowt

As Large Language Models (LLMs) continue to evolve, more are being designed to handle long-context inputs. Despite this advancement, most of them still face challenges in accurately handling long-context tasks, often showing the "lost in…

Computation and Language · Computer Science 2024-12-13 Yijiong Yu , Yongfeng Huang , Zhixiao Qi , Zhe Zhou

In an ever-expanding world of domain-specific knowledge, the increasing complexity of consuming, and storing information necessitates the generation of summaries from large information repositories. However, every persona of a domain has…

Computation and Language · Computer Science 2024-06-10 Ankan Mullick , Sombit Bose , Rounak Saha , Ayan Kumar Bhowmick , Pawan Goyal , Niloy Ganguly , Prasenjit Dey , Ravi Kokku

Transformer-based Large Language Models (LLMs) often impose limitations on the length of the text input to ensure the generation of fluent and relevant responses. This constraint restricts their applicability in scenarios involving long…

Computation and Language · Computer Science 2023-12-18 Weizhi Fei , Xueyan Niu , Pingyi Zhou , Lu Hou , Bo Bai , Lei Deng , Wei Han

With context windows of millions of tokens, Long-Context Language Models (LCLMs) can encode entire document collections, offering a strong alternative to conventional retrieval-augmented generation (RAG). However, it remains unclear whether…

Computation and Language · Computer Science 2026-01-27 Francesco Maria Molfese , Momchil Hardalov , Rexhina Blloshmi , Bill Byrne , Adrià de Gispert

In-context learning (ICL) capabilities are foundational to the success of large language models (LLMs). Recently, context compression has attracted growing interest since it can largely reduce reasoning complexities and computation costs of…

Computation and Language · Computer Science 2024-08-02 Wenshan Wang , Yihang Wang , Yixing Fan , Huaming Liao , Jiafeng Guo

Recent advancements in Large Language Models (LLMs) have significantly enhanced their capacity to process long contexts. However, effectively utilizing this long context remains a challenge due to the issue of distraction, where irrelevant…

Computation and Language · Computer Science 2024-11-12 Zijun Wu , Bingyuan Liu , Ran Yan , Lei Chen , Thomas Delteil

Large Vision-Language Models (LVLMs) excel in cross-model tasks but experience performance declines in long-context reasoning due to overreliance on textual information and reduced visual dependency. In this study, we empirically analyze…

Computation and Language · Computer Science 2024-12-23 Yucheng Zhou , Zhi Rao , Jun Wan , Jianbing Shen

Efficient context compression is crucial for improving the accuracy and scalability of question answering. For the efficiency of Retrieval Augmented Generation, context should be delivered fast, compact, and precise to ensure clue…

Computation and Language · Computer Science 2026-03-11 Thao Do , Dinh Phu Tran , An Vo , Seon Kwon Kim , Daeyoung Kim

Retrieval-augmented generation (RAG) has emerged as an approach to augment large language models (LLMs) by reducing their reliance on static knowledge and improving answer factuality. RAG retrieves relevant context snippets and generates an…

Computation and Language · Computer Science 2025-02-21 Juraj Vladika , Florian Matthes

Large language models (LLMs) have achieved substantial progress in processing long contexts but still struggle with long-context reasoning. Existing approaches typically involve fine-tuning LLMs with synthetic data, which depends on…

Computation and Language · Computer Science 2024-11-14 Siheng Li , Cheng Yang , Zesen Cheng , Lemao Liu , Mo Yu , Yujiu Yang , Wai Lam

Progress on training and architecture strategies has enabled LLMs with millions of tokens in context length. However, empirical evidence suggests that such long-context LLMs can consume far more text than they can reliably use. On the other…

Large language models (LLMs) have triggered a new stream of research focusing on compressing the context length to reduce the computational cost while ensuring the retention of helpful information for LLMs to answer the given question.…

Computation and Language · Computer Science 2024-12-20 Barys Liskavets , Maxim Ushakov , Shuvendu Roy , Mark Klibanov , Ali Etemad , Shane Luke

Recent large reasoning models (LRMs) have demonstrated strong reasoning capabilities through reinforcement learning (RL). These improvements have primarily been observed within the short-context reasoning tasks. In contrast, extending LRMs…

Computation and Language · Computer Science 2025-05-28 Fanqi Wan , Weizhou Shen , Shengyi Liao , Yingcheng Shi , Chenliang Li , Ziyi Yang , Ji Zhang , Fei Huang , Jingren Zhou , Ming Yan

We study reinforcement learning (RL) fine-tuning of large language model (LLM) agents for long-horizon multi-turn tool use, where context length quickly becomes a fundamental bottleneck. Existing RL pipelines can suffer from degraded…

Computation and Language · Computer Science 2025-10-09 Miao Lu , Weiwei Sun , Weihua Du , Zhan Ling , Xuesong Yao , Kang Liu , Jiecao Chen