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arXiv · 2605.30788

XLGoBench: Detecting cross-lingual skill gaps with algorithmic tasks

Purvam Jain·Preethi Jyothi·Vihari Piratla·Suvrat Raju
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Abstract

We introduce a set of synthetic algorithmic tasks to detect cross-lingual gaps in the abilities of large language models. Our benchmark is commensurate across languages, since it requires models to perform the same underlying task in different languages; scalable, since each task can be generated at varying levels of complexity allowing it to be adapted to models with different capabilities; quantifiable, since every task admits an objective notion of correctness; and transparent, since tasks are generated from simple templates that can be readily audited for translation errors. Because our benchmark focuses on algorithmic tasks, differential performance is a sufficient -- but not necessary -- indicator of cross-lingual gaps. Nevertheless, we show through extensive experiments that our benchmark exposes persistent cross-lingual gaps in multiple state-of-the-art models.

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Purvam Jain, Preethi Jyothi, Vihari Piratla, Suvrat Raju. 2026-05-29. XLGoBench: Detecting cross-lingual skill gaps with algorithmic tasks. https://arxiv.org/abs/2605.30788

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