activity
20232026
most citedDon't Waste Your Time: Early Stopping Cross-Validation

4 citations · 10 across the 28 of their papers we have counts for

collaborators

32 papers

cs.LG2026

Advancing Open and Reproducible Relational Learning: RelArena-, TabPFN-Rel and RPI

Adrian Hayler, Klemens Flöge, Alan Arazi +44

This first release of Prior Labs in relational learning shows our continued commitment to open science. We open-source three pieces of software that we expect to accelerate researc…

cs.LG2026

TimEE: End-to-end Time Series Classification via In-Context Learning

Jaris Küken, Shi Bin Hoo, Martin Mráz +2

Time series classification (TSC) is dominated by a two-stage paradigm: train a feature encoder -- either from scratch on the target dataset or via pretraining on large corpora -- a…

cs.LG2026

LLM-Guided ODE Discovery and Parameter Inference from Small-Cohort Aggregate Data

Hanning Yang, Meropi Karakioulaki, Lennart Purucker +3

Mechanistic modeling via ordinary differential equations (ODEs) provides interpretable descriptions of complex dynamics and enables inference of underlying mechanisms, which is par…

cs.LG2026

Beyond IID: How General Are Tabular Foundation Models, Really?

Lennart Purucker, Andrej Tschalzev, Nick Erickson +7

Foundation models for predictive machine learning on tabular data have recently gained significant traction in academia and industry. Research communities across disciplines are in…

cs.LG2026

SurvPFN: Towards Foundation Models for Survival Predictions

Samuel Böhm, Lennart Purucker, Frank Hutter +1

Tabular foundation models (TFMs) have made rapid progress in standard classification and regression, but time-to-event survival prediction tasks have remained largely untouched. Un…

cs.LG2026

Towards Pretraining Text Encoders for TabPFN

Mustafa Tajjar, Alexander Pfefferle, Lennart Purucker +1

Tabular foundation models, such as TabPFN, achieve strong performance on tabular datasets with numerical and categorical data, but do not natively handle high-cardinality text feat…

cs.LG2026

STRABLE: Benchmarking Tabular Machine Learning with Strings

Gioia Blayer, Myung Jun Kim, Félix Lefebvre +8

Benchmarking tabular learning has revealed the benefit of dedicated architectures, pushing the state of the art. But real-world tables often contain string entries, beyond numbers,…

cs.LG2026

MulTaBench: Benchmarking Multimodal Tabular Learning with Text and Image

Alan Arazi, Eilam Shapira, Shoham Grunblat +8

Tabular Foundation Models have recently established the state of the art in supervised tabular learning, by leveraging pretraining to learn generalizable representations of numeric…

cs.LG2026

HAPEns: Hardware-Aware Post-Hoc Ensembling for Tabular Data

Jannis Maier, Lennart Purucker

Ensembling is commonly used in machine learning on tabular data to boost predictive performance and robustness, but larger ensembles often lead to increased hardware demand. We int…

cs.LG2026

Causal Data Augmentation for Robust Fine-Tuning of Tabular Foundation Models

Magnus Bühler, Lennart Purucker, Frank Hutter

Fine-tuning tabular foundation models (TFMs) under data scarcity is challenging, as early stopping on even scarcer validation data often fails to capture true generalization perfor…

cs.LG2025★ 1 cited

nanoTabPFN: A Lightweight and Educational Reimplementation of TabPFN

Alexander Pfefferle, Johannes Hog, Lennart Purucker +1

Tabular foundation models such as TabPFN have revolutionized predictive machine learning for tabular data. At the same time, the driving factors of this revolution are hard to unde…

cs.LG2025

Does TabPFN Understand Causal Structures?

Omar Swelam, Lennart Purucker, Jake Robertson +3

Causal discovery is fundamental for multiple scientific domains, yet extracting causal information from real world data remains a significant challenge. Given the recent success on…

cs.LG2025★ 3 cited

TabPFN-2.5: Advancing the State of the Art in Tabular Foundation Models

Léo Grinsztajn, Klemens Flöge, Oscar Key +23

The first tabular foundation model, TabPFN, and its successor TabPFNv2 have impacted tabular AI substantially, with dozens of methods building on it and hundreds of applications ac…

cs.AI2025

Agentic NL2SQL to Reduce Computational Costs

Dominik Jehle, Lennart Purucker, Frank Hutter

Translating natural language queries into SQL queries (NL2SQL or Text-to-SQL) has recently been empowered by large language models (LLMs). Using LLMs to perform NL2SQL methods on a…

cs.CV2025

Quickly Tuning Foundation Models for Image Segmentation

Breenda Das, Lennart Purucker, Timur Carstensen +1

Foundation models like SAM (Segment Anything Model) exhibit strong zero-shot image segmentation performance, but often fall short on domain-specific tasks. Fine-tuning these models…

cs.LG2025

How Usable is Automated Feature Engineering for Tabular Data?

Bastian Schäfer, Lennart Purucker, Maciej Janowski +1

Tabular data, consisting of rows and columns, is omnipresent across various machine learning applications. Each column represents a feature, and features can be combined or transfo…

cs.LG2025

Real-TabPFN: Improving Tabular Foundation Models via Continued Pre-training With Real-World Data

Anurag Garg, Muhammad Ali, Noah Hollmann +3

Foundation models for tabular data, like TabPFN, achieve strong performance on small datasets when pre-trained solely on synthetic data. We show that this performance can be signif…

cs.LG2025

MARVIS: Modality Adaptive Reasoning over VISualizations

Benjamin Feuer, Lennart Purucker, Oussama Elachqar +1

Predictive applications of machine learning often rely on small (sub 1 Bn parameter) specialized models tuned to particular domains or modalities. Such models often achieve excelle…

cs.LG2025

Early Stopping Tabular In-Context Learning

Jaris Küken, Lennart Purucker, Frank Hutter

Tabular foundation models have shown strong performance across various tabular learning tasks via in-context learning, offering robust generalization without any downstream finetun…

cs.LG2025

TabArena: A Living Benchmark for Machine Learning on Tabular Data

Nick Erickson, Lennart Purucker, Andrej Tschalzev +4

With the growing popularity of deep learning and foundation models for tabular data, the need for standardized and reliable benchmarks is higher than ever. However, current benchma…

cs.LG2025

Unreflected Use of Tabular Data Repositories Can Undermine Research Quality

Andrej Tschalzev, Lennart Purucker, Stefan Lüdtke +3

Data repositories have accumulated a large number of tabular datasets from various domains. Machine Learning researchers are actively using these datasets to evaluate novel approac…

eess.IV2024

Efficient MedSAMs: Segment Anything in Medical Images on Laptop

Jun Ma, Feifei Li, Sumin Kim +79

Promptable segmentation foundation models have emerged as a transformative approach to addressing the diverse needs in medical images, but most existing models require expensive co…

cs.CL2024

Transfer Learning for Finetuning Large Language Models

Tobias Strangmann, Lennart Purucker, Jörg K. H. Franke +3

As the landscape of large language models expands, efficiently finetuning for specific tasks becomes increasingly crucial. At the same time, the landscape of parameter-efficient fi…

cs.CL2024

Ensembling Finetuned Language Models for Text Classification

Sebastian Pineda Arango, Maciej Janowski, Lennart Purucker +3

Finetuning is a common practice widespread across different communities to adapt pretrained models to particular tasks. Text classification is one of these tasks for which many pre…