Gamayun's Path to Multilingual Mastery: Cost-Efficient Training of a 1.5B-Parameter LLM. - Alexander Podolskiy; Semen Molokov; Timofey Gerasin; Maksim Titov; Alexey D. Rukhovich; Artem Khrapov; Kirill Morozov; Evgeny Tetin; Constantine Korikov; Pavel Efimov; Polina Lazukova; Yuliya Skripkar; et al. (CoRR, 2025)