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CLARIN-PT-LDB: An Open LLM Leaderboard for Portuguese to assess Language, Culture and Civility

arXiv cs.CL / 3/16/2026

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Key Points

  • The paper presents CLARIN-PT-LDB, an open leaderboard for evaluating European Portuguese LLMs.
  • It addresses an evaluation gap by introducing benchmarks that cover safeguards and alignment with Portuguese culture.
  • The benchmarks include novel aspects not previously available for European Portuguese, enabling more nuanced assessment of language, civility, and culture.
  • The leaderboard and resources are available at a Hugging Face space, providing an accessible evaluation platform for researchers and developers.

Abstract

This paper reports on the development of a leaderboard of Open Large Language Models (LLM) for European Portuguese (PT-PT), and on its associated benchmarks. This leaderboard comes as a way to address a gap in the evaluation of LLM for European Portuguese, which so far had no leaderboard dedicated to this variant of the language. The paper also reports on novel benchmarks, including some that address aspects of performance that so far have not been available in benchmarks for European Portuguese, namely model safeguards and alignment to Portuguese culture. The leaderboard is available at https://huggingface.co/spaces/PORTULAN/portuguese-llm-leaderboard.