Thai translation and speech-to-text models th

2 models into Thai, 3 from Thai, 12 speech-to-text. Best scored into Thai: Swedish to Thai (chrF++ 29.6). Best scored from Thai: Thai to English (chrF++ 48.2).

Which open models work for Thai?

Windy Translate lists 2 open translation models into Thai and 3 from Thai. All of them can be downloaded from Hugging Face and run on your own hardware. By licence: 3 Apache-2.0 and 2 CC-BY-4.0 (terms and attribution text: licensing). 3 of them have a screening score on FLORES-200. The best scored into Thai is translate-sv-th (chrF++ 29.6, Limited). The best scored from Thai is translate-th-en (chrF++ 48.2, Good).

With English. English to Thai: translate-windy-hplt-en-th (not yet scored). Thai to English: translate-th-en (chrF++ 48.2, Good), the best of 2 direct models. To translate between Thai and a language with no direct model, you can go through English with these two.

By band, the scored Thai models are 1 Good, 1 Usable and 1 Limited (Excellent is chrF++ 60 or more, Good 45 to 60, Usable 30 to 45, Limited 15 to 30). A score is a 48-sentence screening of news and encyclopedia text, not a measure of accuracy, and a difference of a point or two is noise. How we measured.

Speech-to-text. Whisper's tokenizer lists Thai as one of its languages, so all 12 multilingual Whisper-based models here can transcribe it: see the speech models. Accuracy differs a lot between languages and model sizes, and this site has not measured speech accuracy.

Each model page has a short snippet to download and run the model yourself, its licence and attribution text, and its score where there is one. Pick the best scored model for your direction, then try it on a few sentences of your own text: a screening score is a starting point, not a guarantee.

Into Thai

From Thai

Scores: chrF++ on FLORES-200 dev, 48 sentences, measured 2026-08-04. Method.