Hunyuan Translation Model Version 1.5 includes a 1.8B translation model, HY-MT1.5-1.8B, and a 7B translation model, HY-MT1.5-7B. Both models focus on supporting mutual translation across 33 languages and incorporating 5 ethnic and dialect variations. Among them, HY-MT1.5-7B is an upgraded version of our WMT25 championship model, optimized for explanatory translation and mixed-language scenarios, with newly added support for terminology intervention, contextual translation, and formatted translation. Despite having less than one-third the parameters of HY-MT1.5-7B, HY-MT1.5-1.8B delivers translation performance comparable to its larger counterpart, achieving both high speed and high quality. After quantization, the 1.8B model can be deployed on edge devices and support real-time translation scenarios, making it widely applicable.
Key Features and Advantages
HY-MT1.5-1.8B achieves the industry-leading performance among models of the same size, surpassing most commercial translation APIs.
HY-MT1.5-1.8B supports deployment on edge devices and real-time translation scenarios, offering broad applicability.
HY-MT1.5-7B, compared to its September open-source version, has been optimized for annotated and mixed-language scenarios.
Both models support terminology intervention, contextual translation, and formatted translation.
Related News
2025.12.30, we have open-sourced HY-MT1.5-1.8B and HY-MT1.5-7B on Hugging Face.
2025.9.1, we have open-sourced Hunyuan-MT-7B , Hunyuan-MT-Chimera-7B on Hugging Face.
Performance
You can refer to our technical report for more experimental results and analysis.
llama-cli -hf tencent/HY-MT1.5-1.8B-GGUF:Q8_0 -p "Translate the following segment into Chinese, without additional explanation.\n\nIt’s on the house." -n 4096 --temp 0.7 --top-k 20 --top-p 0.6 --repeat-penalty 1.05 --no-warmup
Use with ollama
SHELL
1echo 'FROM hf.co/tencent/HY-MT1.5-1.8B-GGUF:Q8_0\nTEMPLATE """<｜hy_begin▁of▁sentence｜>{{ if .System }}{{ .System }}<｜hy_place▁holder▁no▁3｜>{{ end }}{{ if .Prompt }}<｜hy_User｜>{{ .Prompt }}{{ end }}<｜hy_Assistant｜>"""' > Modelfile
2ollama create hy-mt1.5-1.8b -f Modelfile
3ollama run hy-mt1.5-1.8b
We recommend using the following set of parameters for inference. Note that our model does not have the default system_prompt.
