SEA-LION-v4.8: A Technical Report

Title:SEA-LION-v4.8: A Technical Report

Abstract:We introduce Nemotron-SEA-LION-v4.8, a family of Southeast Asian Languages in One Network (SEA-LION) built upon NVIDIA Nemotron 3. The family includes 30B-A3B and 120B-A12B models, with both continued-pretrained base checkpoints and post-trained variants. We adapt the models using Southeast Asian, reasoning, code, and multilingual parallel datasets, followed by post-training with supervised fine-tuning and online on-policy distillation. On SEA-HELM, the 30B-A3B model improves the overall SEA score from 46.06 to 51.57, while the 120B-A12B model improves from 49.30 to 63.44. The strongest gains are observed in instruction following, natural language reasoning, and natural language understanding across seven Southeast Asian languages.

Computation and Language (cs.CL)

arXiv:2609.18310 [cs.CL]

(or arXiv:2609.18310v1 [cs.CL] for this version)

https://doi.org/10.48550/arXiv.2609.18310 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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