OpenThaiGPT
Open-weight Thai large language model built by AIEAT for research and commercial use
OpenThaiGPT is a free, open-weight Thai LLM best for developers and enterprises that need Thai-language accuracy with the option to self-host for data residency. Built by AIEAT and iApp Technology on top of Qwen 2.5, its 72B-parameter 1.6 release reports the strongest Thai-benchmark scores among open Thai LLMs, and the OpenThai 2.0 Legal30B variant adds statute-aware legal recall. The trade-off: the hosted API is free but rate-limited, commercial use above 100 million monthly active users requires a separate license negotiation under the Qwen License, and production self-hosting requires real GPU/MLOps investment.
- ✓Free, open-weight models under a license that permits commercial use
- ✓Strong Thai-language benchmark performance among open-source Thai LLMs
- ✓Free hosted API removes friction for prototyping Thai-language products
- ✓OpenThai 2.0 Legal30B model adds a niche, statute-aware Thai legal LLM not offered by generalist models
- ×Hosted API is free but rate-limited; production use typically requires self-hosting
- ×Commercial deployments exceeding 100 million monthly active users must negotiate a separate license under the Qwen License
- ×Maintained by a nonprofit industry association and volunteer community rather than a commercial vendor with SLA-backed support
- ×No self-serve affiliate or partner program
About OpenThaiGPT
OpenThaiGPT is an open-weight large language model family built specifically for the Thai language, developed by the Artificial Intelligence Entrepreneur Association of Thailand (AIEAT) together with iApp Technology and a community of volunteer developers. Built on top of Qwen 2.5 and further trained on Thai data, OpenThaiGPT 1.6 (72B parameters) reports the highest average scores across Thai-language exam benchmarks among open-source Thai LLMs. Models are published free on Hugging Face, with a free hosted API available at openthai.aieat.or.th for prototyping.
Key Features
Best For
Southeast Asia Fit
OpenThaiGPT is developed and maintained in Thailand by AIEAT, the Artificial Intelligence Entrepreneur Association of Thailand, together with Bangkok-based iApp Technology. It is trained specifically to maximize Thai-language accuracy rather than treating Thai as one of many supported languages, and the open-weight license lets Thai banks, hospitals, and government-adjacent teams self-host for data residency instead of sending Thai text to an overseas API.
- Thailand
- SEA
Integrations
- Other
- Hugging Face
- Qwen 2.5
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The questions operators actually ask.
Is OpenThaiGPT free to use commercially?
Yes, under the Qwen License, which permits research and commercial use. Products with more than 100 million monthly active users must negotiate a separate commercial license.
Can OpenThaiGPT be self-hosted?
Yes. Model weights are published on Hugging Face, so teams can self-host on their own GPU infrastructure instead of relying on the rate-limited free hosted API.
Who maintains OpenThaiGPT?
The Artificial Intelligence Entrepreneur Association of Thailand (AIEAT), together with iApp Technology and a community of volunteer developers.