To address the severe data scarcity in Tibetan, a low-resource language spoken by over six million people, we introduce TIBSTC-CoT, the large-scale, multi-domain Tibetan dataset automatically constructed via chain-of-thought prompting with large language models (LLMs). TIBSTC-CoT establishes a scalable and reproducible framework for dataset creation in low-resource settings, covering diverse domains and reasoning patterns essential for language understanding and generation. Building on this dataset, we develop the Sunshine-thinking LLM family, a series of Tibetan-centric LLMs equipped with chain-of-thought capabilities. Trained entirely on TIBSTC-CoT, Sunshine-thinking has demonstrated strong reasoning and generation performance, comparable to state-of-the-art (SOTA) multilingual LLMs. Our work marks a significant step toward inclusive AI by enabling high-quality Tibetan language processing through both resource creation and model innovation. All data are available: https://github.com/Vicentvankor/sun-shine.
@article{arxiv.2508.01977,
title = {TIBSTC-CoT: A Multi-Domain Instruction Dataset for Chain-of-Thought Reasoning in Language Models},
author = {Fan Gao and Cheng Huang and Nyima Tashi and Yutong Liu and Xiangxiang Wang and Thupten Tsering and Ban Ma-bao and Renzeg Duojie and Gadeng Luosang and Rinchen Dongrub and Dorje Tashi and Xiao Feng and Hao Wang and Yongbin Yu},
journal= {arXiv preprint arXiv:2508.01977},
year = {2025}
}