activity
20222026
most citedChatGPT: A Meta-Analysis after 2.5 Months

23 citations · 48 across the 17 of their papers we have counts for

collaborators

19 papers

cs.CV2026

VisExMEM: Visual Evidence-Based Explainable Multimodal Evaluation Metric

Subhadeep Roy, Christoph Leiter, Steffen Eger

Current image-text evaluation often relies on a global score, which gives limited insight into which semantic details are supported by the image. Explainable metrics provide ration…

cs.CL2026

When Writing Style Drifts: Benchmarking Authorship Verification under Distribution Shifts in Genre, Time and the AI-Era

Lotta Kiefer, Brisca Balthes, Christoph Leiter +3

Authorship verification (AV) assumes that an author's writing style remains sufficiently stable to distinguish it from that of other writers. In practice, however, this assumption…

cs.CL2026

Who Annotates in NLP? A Large-scale Assessment of Human Annotation Reporting between 2018 and 2025

Maria Kunilovskaya, Gagan Bhatia, Lisa Sophie Albertelli +10

Human annotation is the empirical foundation of much NLP research, from dataset construction to model evaluation, but papers often leave unclear who produced the annotations and ho…

cs.CL2026

ValueGround: Evaluating Culture-Conditioned Visual Value Grounding in MLLMs

Zhipin Wang, Christoph Leiter, Christian Frey +3

Cultural values are expressed not only through language but also through visual scenes and everyday social practices. Yet existing evaluations of cultural values in language models…

cs.CL2026

ExCAM: Explainable Cultural Awareness Metrics

Christoph Leiter, Haiyue Song, Hour Kaing +4

Evaluating the cultural awareness of large language models is crucial to ensure the fairness of generated text and the generalizability of applications across the world. Recent ben…

cs.CL2026

GerAV: Towards New Heights in German Authorship Verification using Fine-Tuned LLMs on a New Benchmark

Lotta Kiefer, Christoph Leiter, Sotaro Takeshita +2

Authorship verification (AV) is the task of determining whether two texts were written by the same author and has been studied extensively, predominantly for English data. In contr…

cs.CL2025★ 1 cited

DeepSeek-R1 vs. o3-mini: How Well can Reasoning LLMs Evaluate MT and Summarization?

Daniil Larionov, Sotaro Takeshita, Ran Zhang +5

Reasoning-enabled large language models (LLMs) excel in logical tasks, yet their utility for evaluating natural language generation remains unexplored. This study systematically co…

cs.CV2025

CROC: Evaluating and Training T2I Metrics with Pseudo- and Human-Labeled Contrastive Robustness Checks

Christoph Leiter, Yuki M. Asano, Margret Keuper +1

The assessment of evaluation metrics (meta-evaluation) is crucial for determining the suitability of existing metrics in text-to-image (T2I) generation tasks. Human-based meta-eval…

cs.AI2024★ 1 cited

ScImage: How Good Are Multimodal Large Language Models at Scientific Text-to-Image Generation?

Leixin Zhang, Steffen Eger, Yinjie Cheng +6

Multimodal large language models (LLMs) have demonstrated impressive capabilities in generating high-quality images from textual instructions. However, their performance in generat…

cs.DL2024

NLLG Quarterly arXiv Report 09/24: What are the most influential current AI Papers?

Christoph Leiter, Jonas Belouadi, Yanran Chen +4

The NLLG (Natural Language Learning & Generation) arXiv reports assist in navigating the rapidly evolving landscape of NLP and AI research across cs.CL, cs.CV, cs.AI, and cs.LG cat…

cs.CL2024

PrExMe! Large Scale Prompt Exploration of Open Source LLMs for Machine Translation and Summarization Evaluation

Christoph Leiter, Steffen Eger

Large language models (LLMs) have revolutionized NLP research. Notably, in-context learning enables their use as evaluation metrics for natural language generation, making them par…

cs.DL2023

NLLG Quarterly arXiv Report 09/23: What are the most influential current AI Papers?

Ran Zhang, Aida Kostikova, Christoph Leiter +5

Artificial Intelligence (AI) has witnessed rapid growth, especially in the subfields Natural Language Processing (NLP), Machine Learning (ML) and Computer Vision (CV). Keeping pace…

cs.CL2023

The Eval4NLP 2023 Shared Task on Prompting Large Language Models as Explainable Metrics

Christoph Leiter, Juri Opitz, Daniel Deutsch +3

With an increasing number of parameters and pre-training data, generative large language models (LLMs) have shown remarkable capabilities to solve tasks with minimal or no task-rel…

cs.CY2023★ 2 cited

NLLG Quarterly arXiv Report 06/23: What are the most influential current AI Papers?

Steffen Eger, Christoph Leiter, Jonas Belouadi +5

The rapid growth of information in the field of Generative Artificial Intelligence (AI), particularly in the subfields of Natural Language Processing (NLP) and Machine Learning (ML…

cs.CL2023★ 6 cited

Towards Explainable Evaluation Metrics for Machine Translation

Christoph Leiter, Piyawat Lertvittayakumjorn, Marina Fomicheva +3

Unlike classical lexical overlap metrics such as BLEU, most current evaluation metrics for machine translation (for example, COMET or BERTScore) are based on black-box large langua…

cs.CL2023★ 23 cited

ChatGPT: A Meta-Analysis after 2.5 Months

Christoph Leiter, Ran Zhang, Yanran Chen +4

ChatGPT, a chatbot developed by OpenAI, has gained widespread popularity and media attention since its release in November 2022. However, little hard evidence is available regardin…

cs.CL2022★ 1 cited

BMX: Boosting Natural Language Generation Metrics with Explainability

Christoph Leiter, Hoa Nguyen, Steffen Eger

State-of-the-art natural language generation evaluation metrics are based on black-box language models. Hence, recent works consider their explainability with the goals of better u…

cs.CL2022★ 2 cited

EffEval: A Comprehensive Evaluation of Efficiency for MT Evaluation Metrics

Daniil Larionov, Jens Grünwald, Christoph Leiter +1

Efficiency is a key property to foster inclusiveness and reduce environmental costs, especially in an era of LLMs. In this work, we provide a comprehensive evaluation of efficiency…

cs.CL2022★ 12 cited

Towards Explainable Evaluation Metrics for Natural Language Generation

Christoph Leiter, Piyawat Lertvittayakumjorn, Marina Fomicheva +3

Unlike classical lexical overlap metrics such as BLEU, most current evaluation metrics (such as BERTScore or MoverScore) are based on black-box language models such as BERT or XLM-…