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SEA-LION

by AI Singapore · est. 2023

AI Singapore's open-source large language model family trained with Southeast Asian languages as a first-class priority. SEA-LION covers 11 ASEAN languages including Bahasa Melayu, Bahasa Indonesia, Thai, Filipino, Tagalog, Vietnamese, Tamil, and Burmese — filling the gap left by English-first models that perform poorly on ASEAN public-sector documents and citizen-facing applications.

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AIMenta verdict
Niche use
3/5

"The only open-weight model trained with a focus on Southeast Asian languages (Bahasa Melayu, Bahasa Indonesia, Thai, Filipino, Vietnamese, Tamil). Essential for government and public-sector AI deployments in ASEAN where ASEAN language capability is non-negotiable."

Features
6
Use cases
4
Watch outs
4
What it does

Key features

  • 11 ASEAN languages as first-class (not afterthought)
  • Open weights (Apache 2.0)
  • 7B and 70B variants
  • Singapore government-backed development and governance
  • Designed for ASEAN public-sector document types
  • Strong Bahasa Melayu/Indonesia performance
When to reach for it

Best for

  • Malaysian and Indonesian government/GLC deployments requiring BM capability
  • Thai public-sector and financial services AI
  • Vietnamese language document intelligence
  • ASEAN multilingual applications serving users across multiple countries
Don't get burned

Limitations to know

  • ! Smaller training corpus vs Chinese-optimised models on Chinese-language tasks
  • ! English performance below frontier models — use for ASEAN language tasks specifically
  • ! Smaller community and ecosystem than LLaMA/Qwen families
  • ! Government-backed development means slower commercial update cadence
Context

About SEA-LION

SEA-LION is a AI productivity tool from AI Singapore, launched in 2023. AI Singapore's open-source large language model family trained with Southeast Asian languages as a first-class priority. SEA-LION covers 11 ASEAN languages including Bahasa Melayu, Bahasa Indonesia, Thai, Filipino, Tagalog, Vietnamese, Tamil, and Burmese — filling the gap left by English-first models that perform poorly on ASEAN public-sector documents and citizen-facing applications.

Notable capabilities include 11 ASEAN languages as first-class (not afterthought), Open weights (Apache 2.0), and 7B and 70B variants. Teams typically deploy SEA-LION for malaysian and Indonesian government/GLC deployments requiring BM capability and thai public-sector and financial services AI.

Common trade-offs to weigh: smaller training corpus vs Chinese-optimised models on Chinese-language tasks and english performance below frontier models — use for ASEAN language tasks specifically. AIMenta editorial take for APAC mid-market: The only open-weight model trained with a focus on Southeast Asian languages (Bahasa Melayu, Bahasa Indonesia, Thai, Filipino, Vietnamese, Tamil). Essential for government and public-sector AI deployments in ASEAN where ASEAN language capability is non-negotiable.

Beyond this tool

Where this category meets practice depth.

A tool only matters in context. Browse the service pillars that operationalise it, the industries where it ships, and the Asian markets where AIMenta runs adoption programs.

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