Free, open-weight Thai large language models.
Free, open-weight Thai large language models.
formerly OpenThaiGPT
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.
| Need | Model | Size |
|---|---|---|
| ⚡ Typed decisions in one pass: classification, routing, scoring, yes/no, agent action selection (no text generation) | OpenThai-SystemOne ← newest | 0.8B |
| ⚖️ Thai law, statute citation, legal RAG | OpenThai 2.0 Legal | 30B MoE (~3B active) |
| 🧠 Reasoning, maths, logic, code | OpenThaiGPT R1 | 32B |
| 💬 General Thai chat and coding | OpenThaiGPT 1.6 | 72B |
| 💻 Limited GPU | OpenThaiGPT 1.5 | 7B / 14B |
OpenThai-SystemOne and OpenThai 2.0 Legal are published under the
iapporg, where they are maintained. They are OpenThai project models — those are the canonical copies, not mirrors. SystemOne: code · playground ·pip install openthai-systemone
We need help with Thai evaluation data, domain fine-tunes (medical, government, education), and inference tooling. Start in Discord.
OpenThai (formerly OpenThaiGPT) — openthai.aieat.or.th
