Hunyuan-MT | Lab Index

Open-source translation model series supporting 33 languages. Won first place in 30 of 31 categories at WMT25. Includes Hunyuan-MT-7B and Hunyuan-MT-Chimera-7B, with HY-MT1.5 upgrades in Dec 2025.

Paper (arXiv)Paper (HY-MT1.5, arXiv)GitHub HuggingFace (MT-7B)HuggingFace (MT-1.5)Announcement

Model Details

Architecture DENSE

Parameters 7B

Variants

Name	Parameters	Notes
Hunyuan-MT-7B	—	WMT25 champion
Hunyuan-MT-Chimera-7B	—	Ensemble learning architecture
HY-MT1.5-7B	—	Released Dec 2025, adds terminology and contextual translation

nlpopen-weight