# OpenThai
**Free, open-weight Thai large language models.**
*formerly OpenThaiGPT*
[Website](https://openthai.aieat.or.th) · [Leaderboard](https://huggingface.co/spaces/openthaigpt/thai-llm-leaderboard) · [Ollama](https://ollama.com/openthai) · [GitHub](https://github.com/OpenThaiGPT) · [Discord](https://discord.gg/7KDdKkBGUs) · [Papers](https://arxiv.org/abs/2504.01789)
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Thai is spoken by 70 million people and served by almost no open models. We build them —
trained on Thai data, evaluated on Thai benchmarks, and released open-weight so that Thai
organisations can self-host and keep Thai data in Thailand.
Run by the **AI Entrepreneur Association of Thailand (AIEAT)** with **iApp Technology** and
a community of volunteer researchers. A contributing member of Thailand's national
**ThaiLLM** initiative.
## Which model should I use?
| Need | Model | Size |
|---|---|---|
| ⚖️ Thai law, statute citation, legal RAG | [**OpenThai 2.0 Legal**](https://huggingface.co/iapp/openthai2.0-legal-thaillm-nemotron-3-nano-30b-a3b) ← newest | 30B MoE (~3B active) |
| 🧠 Reasoning, maths, logic, code | [**OpenThaiGPT R1**](https://huggingface.co/openthaigpt/openthaigpt-r1-32b-instruct) | 32B |
| 💬 General Thai chat and coding | [**OpenThaiGPT 1.6**](https://huggingface.co/openthaigpt/openthaigpt-1.6-72b-instruct) | 72B |
| 💻 Limited GPU | [**OpenThaiGPT 1.5**](https://huggingface.co/openthaigpt/openthaigpt1.5-7b-instruct) | 7B / 14B |
> **OpenThai 2.0 Legal** is published under the [`iapp`](https://huggingface.co/iapp) org,
> where it is maintained. It is an OpenThai project model — that is the canonical copy,
> not a mirror.
## Papers
- [**OpenThaiGPT 1.6 and R1**: Thai-Centric Open Source and Reasoning Large Language Models](https://arxiv.org/abs/2504.01789) (2025)
- [**OpenThaiGPT 1.5**: A Thai-Centric Open Source Large Language Model](https://arxiv.org/abs/2411.07238) (2024) · [Springer LNCS](https://link.springer.com/chapter/10.1007/978-3-031-97144-0_19)
## Get involved
We need help with Thai evaluation data, domain fine-tunes (medical, government,
education), and inference tooling. Start in [Discord](https://discord.gg/7KDdKkBGUs).
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*OpenThai (formerly OpenThaiGPT) — [openthai.aieat.or.th](https://openthai.aieat.or.th)*