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Large language models are capable of in-context learning, the ability to perform new tasks at test time using a handful of input-output examples, without parameter updates. We develop a universal approximation theory to elucidate how…

Machine Learning · Computer Science 2025-08-29 Gen Li , Yuchen Jiao , Yu Huang , Yuting Wei , Yuxin Chen

Large transformer models have been shown to be capable of performing in-context learning. By using examples in a prompt as well as a query, they are capable of performing tasks such as few-shot, one-shot, or zero-shot learning to output the…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Antony Zhao , Alex Proshkin , Fergal Hennessy , Francesco Crivelli

In-Context Learning (ICL) enables pretrained LLMs to adapt to downstream tasks by conditioning on a small set of input-output demonstrations, without any parameter updates. Although there have been many theoretical efforts to explain how…

Machine Learning · Computer Science 2026-03-23 Xuhan Tong , Yuchen Zeng , Jiawei Zhang

In this work, we introduce a novel paradigm for generalized In-Context Learning (ICL), termed Indirect In-Context Learning. In Indirect ICL, we explore demonstration selection strategies tailored for two distinct real-world scenarios:…

Machine Learning · Computer Science 2025-10-03 Hadi Askari , Shivanshu Gupta , Terry Tong , Fei Wang , Anshuman Chhabra , Muhao Chen

Large language models (LLMs) exhibit impressive in-context learning (ICL) capabilities, yet the quality of their predictions is fundamentally limited by the few costly labeled demonstrations that can fit into a prompt. Meanwhile, there…

Machine Learning · Computer Science 2026-01-16 Renpu Liu , Jing Yang

Large pre-trained sequence models, such as transformers, excel as few-shot learners capable of in-context learning (ICL). In ICL, a model is trained to adapt its operation to a new task based on limited contextual information, typically in…

Information Theory · Computer Science 2024-04-12 Matteo Zecchin , Kai Yu , Osvaldo Simeone

Despite the surprising few-shot performance of in-context learning (ICL), it is still a common practice to randomly sample examples to serve as context. This paper advocates a new principle for ICL: self-adaptive in-context learning. The…

Computation and Language · Computer Science 2023-05-04 Zhiyong Wu , Yaoxiang Wang , Jiacheng Ye , Lingpeng Kong

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

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-context learning (ICL) -- the capacity of a model to infer and apply abstract patterns from examples provided within its input -- has been extensively studied in large language models trained for next-token prediction on human text. In…

Machine Learning · Computer Science 2026-03-19 Nathan Breslow , Aayush Mishra , Mahler Revsine , Michael C. Schatz , Anqi Liu , Daniel Khashabi

Large language models (LLMs) can adapt to new tasks via in-context learning (ICL) without parameter updates, making them powerful learning engines for fast adaptation. While extensive research has examined ICL as a few-shot learner, whether…

Machine Learning · Computer Science 2025-09-30 Liuwang Kang , Fan Wang , Shaoshan Liu , Hung-Chyun Chou , Chuan Lin , Ning Ding

Large Language Models (LLMs) have demonstrated remarkable in-context learning (ICL) capabilities. In this study, we explore a surprising phenomenon related to ICL: LLMs can perform multiple, computationally distinct ICL tasks…

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

Large language models have demonstrated the ability to perform \textit{in-context learning} (ICL), whereby the model performs predictions by directly mapping the query and a few examples from the given task to the output variable. In this…

Signal Processing · Electrical Eng. & Systems 2025-12-02 Meng Hua , Wenjing Zhang , Chenghong Bian , Deniz Gunduz

Recent studies have demonstrated that In-Context Learning (ICL), through the use of specific demonstrations, can align Large Language Models (LLMs) with human preferences known as In-Context Alignment (ICA), indicating that models can…

Computation and Language · Computer Science 2024-06-18 Heyan Huang , Yinghao Li , Huashan Sun , Yu Bai , Yang Gao

In-context learning (ICL), which promotes inference with several demonstrations, has become a widespread paradigm to stimulate LLM capabilities for downstream tasks. Due to context length constraints, it cannot be further improved in spite…

Computation and Language · Computer Science 2024-06-04 Jiahao Li , Quan Wang , Licheng Zhang , Guoqing Jin , Zhendong Mao

The emergence of in-context learning (ICL) in large language models (LLMs) remains poorly understood despite its consistent effectiveness, enabling models to adapt to new tasks from only a handful of examples. To clarify and improve these…

Machine Learning · Computer Science 2025-10-02 Waïss Azizian , Ali Hasan

Numerous studies have demonstrated that the Transformer architecture possesses the capability for in-context learning (ICL). In scenarios involving function approximation, context can serve as a control parameter for the model, endowing it…

Machine Learning · Computer Science 2025-11-11 Qian Ma , Ruoxiang Xu , Yongqiang Cai

In-context Learning (ICL) has emerged as a powerful paradigm for performing natural language tasks with Large Language Models (LLM) without updating the models' parameters, in contrast to the traditional gradient-based finetuning. The…

Computation and Language · Computer Science 2025-08-11 Georgios Chochlakis , Alexandros Potamianos , Kristina Lerman , Shrikanth Narayanan

We perform in-depth evaluations of in-context learning (ICL) on state-of-the-art transformer, state-space, and hybrid large language models over two categories of knowledge-based ICL tasks. Using a combination of behavioral probing and…

Computation and Language · Computer Science 2026-03-02 Shenran Wang , Timothy Tin-Long Tse , Jian Zhu