Poster Wed, Dec 9, 2026 • 10:00 AM – 1:00 PM AEDT Hall 1-4

The FACTS Leaderboard: A Comprehensive Benchmark for Large Language Model Factuality

Aileen Cheng ⋅ Alon Jacovi ⋅ Amir Globerson ⋅ Ben Golan ⋅ Zhaobin Kuang ⋅ Chris Alberti ⋅ Connie Tao ⋅ Eyal Ben-David ⋅ Gaurav Singh Tomar ⋅ Lukas Haas ⋅ Yonatan Bitton ⋅ Adam Bloniarz ⋅ Aijun Bai ⋅ Andrew Wang ⋅ Anfal Siddiqui ⋅ Aravindan Raghuveer ⋅ Arturo Bajuelos Castillo ⋅ Aviel Atias ⋅ Chang Liu ⋅ Corey Fry ⋅ Daniel Balle ⋅ Deepanway Ghosal ⋅ Doron Kukliansky ⋅ Dror Marcus ⋅ Elena Gribovskaya ⋅ Eran Ofek ⋅ Honglei Zhuang ⋅ Itay Laish ⋅ Jan Ackermann ⋅ Lily Wang ⋅ Megan Risdal ⋅ Megan Barnes ⋅ Michael Fink ⋅ Mohamed Amin ⋅ Moran R Ambar ⋅ Natan Potikha ⋅ Nikita Gupta ⋅ Nitzan Katz ⋅ Noam Velan ⋅ Ofir Roval ⋅ Ori Ram ⋅ Polina Zablotskaia ⋅ Prathamesh Bang ⋅ Priyanka Agrawal ⋅ Rakesh Ghiya ⋅ Sanjay Ganapathy ⋅ Simon Baumgartner ⋅ Sofia Erell ⋅ Sushant Prakash ⋅ Thibault Sellam ⋅ Vikram R Sudarshan ⋅ Xuanhui Wang ⋅ Yaroslav Akulov ⋅ Yulong Yang ⋅ ZHEN YANG ⋅ Zhixin Lai ⋅ Zhongru Wu ⋅ Avinatan Hassidim ⋅ Fernando Pereira ⋅ Slav Petrov ⋅ Srinivasan Venkatachary ⋅ Tulsee Doshi ⋅ Yossi Matias ⋅ Sasha Goldshtein ⋅ Dipanjan Das

[ OpenReview]

Abstract

We introduce The FACTS Leaderboard, an online leaderboard suite and associated set of benchmarks that comprehensively evaluates the ability of language models to generate factually accurate text across diverse scenarios. The suite provides a holistic measure of factuality by aggregating the performance of models on four distinct sub-leaderboards: (1) FACTS Multimodal, which measures the factuality of responses to image-based questions; (2) FACTS Parametric, which assesses models’ world knowledge by answering closed-book factoid questions from internal parameters; (3) FACTS Search, which evaluates factuality in information-seeking scenarios, where the model must use a search API; and (4) FACTS Grounding (v2), which evaluates whether long-form responses are grounded in provided documents, featuring significantly improved judge models. Each sub-leaderboard employs automated judge models to score model responses, and the final suite score is an average of the four components, designed to provide a robust and balanced assessment of a model’s overall factuality. The FACTS Leaderboard Suite will be actively maintained, containing both public and private splits to allow for external participation while guarding its integrity. It can be found at https://www.kaggle.com/benchmarks/google/facts.

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