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🏠 OpenThai Introduction

OpenThai (formerly OpenThaiGPT) builds open-weight large language models for the Thai language, free for everyone to use. It is run by the Artificial Intelligence Entrepreneur Association of Thailand (AIEAT) together with iApp Technology and a community of volunteer developers.

Every model is published on Hugging Face and can be self-hosted on your own hardware, for research and for commercial use.

🚀 Latest models​

NewđŸŽ¯OpenThai-SystemOne0.8B ¡ 74.3 public bench ¡ free, Apache-2.0A Thai Jev is here: text + questions in, answers with a confidence score out, in one pass. For text classification, sentiment analysis and agentic computer use. Runs on a laptop.Read the announcement🚀OpenThai 2.027B ¡ multimodal (image + text) ¡ Apache 2.0Our flagship: reads Thai documents and handwriting at specialist level, leads open models on Thai knowledge, and beats its base model on agentic tool use.Read the announcement⚖ī¸OpenThai 2.0 Legal30B MoE ¡ ~3B active per token ¡ 24 GB GPUAn open-weight Thai legal LLM that recalls statutes from memory and returns the exact law name and section as JSON, ready for RAG pipelines.Read the announcement🌟OpenThaiGPT 1.6 72b72B ¡ general-purpose modelA general-purpose Thai language model, strongest on coding and Thai language understanding, with language accuracy as high as 98.2%.See details🧠OpenThaiGPT R1 32b32B ¡ reasoning modelA reasoning model that shows its thought process step by step and outscores 70b models at less than half their size.See details

All seven models, with download links for Hugging Face, Ollama and LM Studio, are listed on the home page.

Try it out​

Talk to the models in your browser — nothing to install.

Try OpenThai-SystemOne in your browseriapp.co.th/docs/llm/openthai-systemone

Try OpenThai 2.0 free — no installchinda3.iapp.co.th

Try OpenThai 2.0 Legal + full documentationiapp.co.th/openmodels/openthai2p0-legal

Download every model on Hugging Facehuggingface.co/openthaigpt

About the project​

  • Open weights — free to download and self-host, for research and commercial use alike
  • Thai-first by design — trained and evaluated on Thai data and Thai benchmarks
  • Community-driven — built by Thai volunteers and researchers
  • Documented and published — technical reports and benchmark results released openly

Support​

The OpenThai Team​

Sponsors​

  • Supported with 8x Nvidia H100 GPUs by Siam AI Corporation Co., Ltd.: siam.ai
  • Funded by a research grant from the Science, Research and Innovation Promotion Fund, through the Program Management Unit for Competitiveness (PMUC), in collaboration with iApp Technology Co., Ltd., with the Artificial Intelligence Entrepreneur Association of Thailand as the project operator

Disclaimer: Provided responses are not guaranteed.