activity
20242026
most citedBreaking reCAPTCHAv2

17 citations · 18 across the 19 of their papers we have counts for

collaborators

20 papers

cs.LG2026

A Cheap Verifier is Good Enough: LLM Post-training is Robust to Erroneous Rewards

Andreas Plesner, Curtis Northcutt, Francisco Guzmán +1

When post-training large language models on tasks with semi-verifiable rewards, there are many factors (training steps, base model size, training order, data quality, verifier accu…

cs.AI2026

StudentBench: AI and human tutoring yield equivalent GRE learning gains

Curtis Northcutt, Inaara Hasmani, Kevin Feng +3

Artificial intelligence offers an unprecedented opportunity to augment human capabilities, yet progress at the frontier has focused primarily on advancing model capabilities. We in…

cs.AI2026

GraphARC: A Comprehensive Benchmark for Graph-Based Abstract Reasoning

Saku Peltonen, August Bøgh Rønberg, Andreas Plesner +1

Relational reasoning lies at the heart of intelligence, but existing benchmarks are typically confined to formats such as grids or text. We introduce GraphARC, a benchmark for abst…

cs.LG2026

An Imperfect Verifier is Good Enough: Learning with Noisy Rewards

Andreas Plesner, Francisco Guzmán, Anish Athalye

Reinforcement Learning with Verifiable Rewards (RLVR) is widely used for post-training Large Language Models, but practical verifiers can make errors. We study how the rate and str…

cs.LG2026

BitLogic: Training Framework for Gradient-Based FPGA-Native Neural Networks

Simon Bührer, Andreas Plesner, Aczel Till +1

Gradient-based LUT- and logic-gate-based neural networks (LUTNet, LogicNets, DiffLogic, PolyLUT, NeuraLUT, WARP-LUT, DWN, LILogicNet, LightLUT) replace multiply-accumulate arithmet…

cs.CV2026

GIC-DLC: Differentiable Logic Circuits for Hardware-Friendly Grayscale Image Compression

Till Aczel, David F. Jenny, Simon Bührer +3

Neural image codecs achieve higher compression ratios than traditional hand-crafted methods such as PNG or JPEG-XL, but often incur substantial computational overhead, limiting the…

cs.LG2025

From MNIST to ImageNet: Understanding the Scalability Boundaries of Differentiable Logic Gate Networks

Sven Brändle, Till Aczel, Andreas Plesner +1

Differentiable Logic Gate Networks (DLGNs) are a very fast and energy-efficient alternative to conventional feed-forward networks. With learnable combinations of logical gates, DLG…

cs.CV2025★ 1 cited

The Impact of Scaling Training Data on Adversarial Robustness

Marco Zimmerli, Andreas Plesner, Till Aczel +1

Deep neural networks remain vulnerable to adversarial examples despite advances in architectures and training paradigms. We investigate how training data characteristics affect adv…

cs.LG2025

Light Differentiable Logic Gate Networks

Lukas Rüttgers, Till Aczel, Andreas Plesner +1

Differentiable logic gate networks (DLGNs) exhibit extraordinary efficiency at inference while sustaining competitive accuracy. But vanishing gradients, discretization errors, and…

cs.CV2025

The Unwinnable Arms Race of AI Image Detection

Till Aczel, Lorenzo Vettor, Andreas Plesner +1

The rapid progress of image generative AI has blurred the boundary between synthetic and real images, fueling an arms race between generators and discriminators. This paper investi…

cs.LG2025

Recurrent Deep Differentiable Logic Gate Networks

Simon Bührer, Andreas Plesner, Till Aczel +1

While differentiable logic gates have shown promise in feedforward networks, their application to sequential modeling remains unexplored. This paper presents the first implementati…

cs.CV2025

Keep It Real: Challenges in Attacking Compression-Based Adversarial Purification

Samuel Räber, Till Aczel, Andreas Plesner +1

Previous work has suggested that preprocessing images through lossy compression can defend against adversarial perturbations, but comprehensive attack evaluations have been lacking…

cs.CV2025

FLIP Reasoning Challenge

Andreas Plesner, Turlan Kuzhagaliyev, Roger Wattenhofer

Over the past years, advances in artificial intelligence (AI) have demonstrated how AI can solve many perception and generation tasks, such as image classification and text writing…

cs.CV2025

Human Aligned Compression for Robust Models

Samuel Räber, Andreas Plesner, Till Aczel +1

Adversarial attacks on image models threaten system robustness by introducing imperceptible perturbations that cause incorrect predictions. We investigate human-aligned learned los…

cs.CV2025

Synthetic Data for Blood Vessel Network Extraction

Joël Mathys, Andreas Plesner, Jorel Elmiger +1

Blood vessel networks in the brain play a crucial role in stroke research, where understanding their topology is essential for analyzing blood flow dynamics. However, extracting de…

cs.FL2025

Universality Frontier for Asynchronous Cellular Automata

Ivan Baburin, Matthew Cook, Florian Grötschla +2

In this work, we investigate the computational aspects of asynchronous cellular automata (ACAs), a modification of cellular automata in which cells update independently, following…

cs.CL2025

ACORD: An Expert-Annotated Retrieval Dataset for Legal Contract Drafting

Steven H. Wang, Maksim Zubkov, Kexin Fan +5

Information retrieval, specifically contract clause retrieval, is foundational to contract drafting because lawyers rarely draft contracts from scratch; instead, they locate and re…

cs.CV2024★ 17 cited

Breaking reCAPTCHAv2

Andreas Plesner, Tobias Vontobel, Roger Wattenhofer

Our work examines the efficacy of employing advanced machine learning methods to solve captchas from Google's reCAPTCHAv2 system. We evaluate the effectiveness of automated systems…

cs.SI2024

Sybil Detection using Graph Neural Networks

Stuart Heeb, Andreas Plesner, Roger Wattenhofer

This paper presents SYBILGAT, a novel approach to Sybil detection in social networks using Graph Attention Networks (GATs). Traditional methods for Sybil detection primarily levera…

cs.CV2024

Seeing Through the Mask: Rethinking Adversarial Examples for CAPTCHAs

Yahya Jabary, Andreas Plesner, Turlan Kuzhagaliyev +1

Modern CAPTCHAs rely heavily on vision tasks that are supposedly hard for computers but easy for humans. However, advances in image recognition models pose a significant threat to…