Open-weight Thai language models you can download and run yourself
Every OpenThai model is published with open weights, free to download for research and commercial use. No permission needed, no API bill.
ollama run openthai/openthai2.0-qwen3.8-27bRequires Ollama — free, on Windows, macOS and Linux
Don’t want to install anything? Chat with OpenThai 2.0 in your browser, free
The two models we actively maintain. Both can be tried in a browser first.
The flagship. Reads Thai documents and handwriting at specialist level, leads open models on Thai knowledge, and calls tools more reliably than the base model it was built from.
ollama run openthai/openthai2.0-qwen3.8-27bModel detailsAn open-weight Thai legal model that recalls statutes from memory and answers with the exact law name and section number as JSON, ready to drop into a RAG pipeline.
ollama run openthai/openthai-2.0-legalModel detailsStill downloadable, and still in real use.
The family’s strongest coder, for general-purpose work, with 98.2% Thai language accuracy.
Model detailsShows its working step by step, and outscores 70b models on Thai at less than half their size.
Model detailsThe most-downloaded model in the family. Built on Qwen 2.5; the 7B fits on an ordinary laptop.
Model detailsThe first open Thai 70b, built on LLaMA v2 with over 10,000 common Thai words added to the model’s vocabulary.
Model detailsOpenThai (formerly OpenThaiGPT) is run by the AI Entrepreneur Association of Thailand (AIEAT) with iApp Technology and a community of volunteer developers, on GPUs donated by Siam AI Cloud and research funding from PMUC.
