Tucano 2 Cool 🦜
Meet Tucano 2 — a family of open-source language models (0.5B to 3.7B parameters) built from the ground up for Portuguese. As of their release, Tucano 2 outperforms most prior Portuguese models of similar size.
Cite as
@misc{correa2026tucano2cool,
title={{Tucano 2 Cool: Better Open Source LLMs for Portuguese}},
author={Nicholas Kluge Corr{\^e}a and Aniket Sen and Shiza Fatimah and Sophia Falk and Lennard Landgraf and Julia Kastner and Lucie Flek},
year={2026},
eprint={2603.03543},
archivePrefix={arXiv},
primaryClass={cs.CL},
url={https://arxiv.org/abs/2603.03543},
}