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cs.CL2026

Progressing beyond Art Masterpieces or Touristic Clichés: how to assess your LLMs for cultural alignment?

António Branco, João Silva, Nuno Marques +10

Although the cultural (mis)alignment of Large Language Models (LLMs) has attracted increasing attention -- often framed in terms of cultural bias -- until recently there has been l…

cs.CL2026

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

João Silva, Luís Gomes, António Branco

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…

cs.CL2026

Sovereign AI-based Public Services are Viable and Affordable

António Branco, Luís Gomes, Rodrigo Santos +4

The rapid expansion of AI-based remote services has intensified debates about the long-term implications of growing structural concentration in infrastructure and expertise. As AI…

cs.CL2024

Open Sentence Embeddings for Portuguese with the Serafim PT* encoders family

Luís Gomes, António Branco, João Silva +2

Sentence encoder encode the semantics of their input, enabling key downstream applications such as classification, clustering, or retrieval. In this paper, we present Serafim PT*,…

cs.CL2024

PORTULAN ExtraGLUE Datasets and Models: Kick-starting a Benchmark for the Neural Processing of Portuguese

Tomás Osório, Bernardo Leite, Henrique Lopes Cardoso +4

Leveraging research on the neural modelling of Portuguese, we contribute a collection of datasets for an array of language processing tasks and a corresponding collection of fine-t…