Hunyuan-MT
modelOpen-source translation model series supporting 33 languages. Hunyuan-MT-7B won first place in 30 of 31 categories at WMT25. Hy-MT2 (May 21, 2026) extends the family with 1.8B / 7B / 30B-A3B variants — the 7B and 30B-A3B reportedly outperform DeepSeek-V4-Pro and Kimi K2.6 on translation, while the 1.8B quantizes to 440MB at 1.25-bit. Ships with IFMTBench, a companion instruction-following translation benchmark.
Paper (arXiv)Paper (HY-MT1.5, arXiv)Paper (Hy-MT2, arXiv)GitHubHuggingFace (MT-7B)HuggingFace (MT-1.5)HuggingFace (Hy-MT2-1.8B)GitHub (Hy-MT2)Announcement (original)
Model Details
Architecture DENSE
Parameters 30B
Active params 3B
Variants
| Name | Parameters | Notes |
|---|---|---|
| Hunyuan-MT-7B | 7B | WMT25 champion (Sep 2025) |
| Hunyuan-MT-Chimera-7B | 7B | Ensemble learning architecture |
| HY-MT1.5-7B | 7B | Released Dec 2025, adds terminology and contextual translation |
| Hy-MT2-1.8B | 1.8B | Released May 21 2026; 1.25-bit quantization fits in 440MB |
| Hy-MT2-7B | 7B | Released May 21 2026; self-reported beats DeepSeek-V4-Pro and Kimi K2.6 on translation |
| Hy-MT2-30B-A3B | 30B | Released May 21 2026; MoE variant |