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In-context learning (ICL) adapts LLMs by providing demonstrations without fine-tuning the model parameters; however, it does not differentiate between demonstrations and quadratically increases the complexity of Transformer LLMs, exhausting…

Computation and Language · Computer Science 2024-11-06 Giwon Hong , Emile van Krieken , Edoardo Ponti , Nikolay Malkin , Pasquale Minervini

Large language models (LLMs) have shown remarkable capacity for in-context learning (ICL), where learning a new task from just a few training examples is done without being explicitly pre-trained. However, despite the success of LLMs, there…

Computation and Language · Computer Science 2023-08-02 Xindi Wang , Yufei Wang , Can Xu , Xiubo Geng , Bowen Zhang , Chongyang Tao , Frank Rudzicz , Robert E. Mercer , Daxin Jiang

Understanding the internal mechanisms of GPT-style transformers, particularly their capacity to perform in-context learning (ICL), is critical for advancing AI alignment and interpretability. In-context learning allows transformers to…

Machine Learning · Computer Science 2024-10-24 Samarth Bhargav , Alexander Gu

The predictions of Large Language Models (LLMs) on downstream tasks often improve significantly when including examples of the input--label relationship in the context. However, there is currently no consensus about how this in-context…

Computation and Language · Computer Science 2024-03-14 Jannik Kossen , Yarin Gal , Tom Rainforth

Autoregressively trained transformers have brought a profound revolution to the world, especially with their in-context learning (ICL) ability to address downstream tasks. Recently, several studies suggest that transformers learn a…

Machine Learning · Computer Science 2024-10-29 Chenyu Zheng , Wei Huang , Rongzhen Wang , Guoqiang Wu , Jun Zhu , Chongxuan Li

Large Language Models (LLMs) have proven effective at In-Context Learning (ICL), an ability that allows them to create predictors from labeled examples. Few studies have explored the interplay between ICL and specific properties of…

Machine Learning · Computer Science 2023-11-23 David Oniani , Yanshan Wang

This paper introduces a novel in-context learning (ICL) framework, inspired by large language models (LLMs), for soft-input soft-output channel equalization in coded multiple-input multiple-output (MIMO) systems. The proposed approach…

Signal Processing · Electrical Eng. & Systems 2025-05-12 Zihang Song , Matteo Zecchin , Bipin Rajendran , Osvaldo Simeone

The emergence of in-context learning (ICL) enables large pre-trained language models (PLMs) to make predictions for unseen inputs without updating parameters. Despite its potential, ICL's effectiveness heavily relies on the quality,…

Machine Learning · Computer Science 2024-07-02 Xiaoling Zhou , Wei Ye , Yidong Wang , Chaoya Jiang , Zhemg Lee , Rui Xie , Shikun Zhang

In-context learning (ICL), the remarkable ability to solve a task from only input exemplars, is often assumed to be a unique hallmark of Transformer models. By examining commonly employed synthetic ICL tasks, we demonstrate that multi-layer…

Machine Learning · Computer Science 2025-02-26 William L. Tong , Cengiz Pehlevan

Transformers have become the dominant architecture for natural language processing. Part of their success is owed to a remarkable capability known as in-context learning (ICL): they can acquire and apply novel associations solely from their…

Artificial Intelligence · Computer Science 2026-01-12 Tiberiu Musat , Tiago Pimentel , Lorenzo Noci , Alessandro Stolfo , Mrinmaya Sachan , Thomas Hofmann

In-context learning (ICL) has become a prominent paradigm to rapidly customize LLMs to new tasks without fine-tuning. However, despite the empirical evidence of its usefulness, we still do not truly understand how ICL works. In this paper,…

Machine Learning · Computer Science 2026-01-06 Harshita Narnoli , Mihai Surdeanu

Transformers have the capacity to act as supervised learning algorithms: by properly encoding a set of labeled training ("in-context") examples and an unlabeled test example into an input sequence of vectors of the same dimension, the…

Machine Learning · Computer Science 2024-12-16 Spencer Frei , Gal Vardi

Large Language Models (LLMs) have showcased their In-Context Learning (ICL) capabilities, enabling few-shot learning without the need for gradient updates. Despite its advantages, the effectiveness of ICL heavily depends on the choice of…

Computation and Language · Computer Science 2024-06-19 Vinay M. S. , Minh-Hao Van , Xintao Wu

By simply incorporating demonstrations into the context, in-context learning (ICL) enables large language models (LLMs) to yield awesome performance on many tasks. In this study, we focus on passage-level long-context ICL for generation…

Computation and Language · Computer Science 2025-06-09 Hao Sun , Chenming Tang , Gengyang Li , Yunfang Wu

Regression and Bayesian accounts of in-context learning (ICL) explain how demonstrations can induce predictors, while mechanistic analyses often identify compact activation directions that steer prompted behavior. However, it remains…

Machine Learning · Computer Science 2026-05-20 Wei Tang , Xinyan Jiang , Fakhri Karray , Lijie Hu

In order to understand the in-context learning phenomenon, recent works have adopted a stylized experimental framework and demonstrated that Transformers can learn gradient-based learning algorithms for various classes of real-valued…

Machine Learning · Computer Science 2023-10-05 Satwik Bhattamishra , Arkil Patel , Phil Blunsom , Varun Kanade

Implicit in-context learning (ICL) has newly emerged as a promising paradigm that simulates ICL behaviors in the representation space of Large Language Models (LLMs), aiming to attain few-shot performance at zero-shot cost. However,…

Computation and Language · Computer Science 2025-09-30 Jiaqian Li , Yanshu Li , Ligong Han , Ruixiang Tang , Wenya Wang

Large language models (LLMs) have demonstrated remarkable proficiency in in-context learning (ICL), where models adapt to new tasks through example-based prompts without requiring parameter updates. However, understanding how tasks are…

Computation and Language · Computer Science 2025-11-11 Baturay Saglam , Xinyang Hu , Zhuoran Yang , Dionysis Kalogerias , Amin Karbasi

Recently, the mysterious In-Context Learning (ICL) ability exhibited by Transformer architectures, especially in large language models (LLMs), has sparked significant research interest. However, the resilience of Transformers' in-context…

Computation and Language · Computer Science 2024-05-02 Chen Cheng , Xinzhi Yu , Haodong Wen , Jingsong Sun , Guanzhang Yue , Yihao Zhang , Zeming Wei

Large language models (LLM) have recently shown the extraordinary ability to perform unseen tasks based on few-shot examples provided as text, also known as in-context learning (ICL). While recent works have attempted to understand the…

Computation and Language · Computer Science 2024-04-05 Harmon Bhasin , Timothy Ossowski , Yiqiao Zhong , Junjie Hu