Catalysing AI Innovation for
Southeast Asia

SEA-LION is a family of efficient, open-source, multilingual, multimodal language models designed to understand Southeast Asia’s diverse languages, cultures, and contexts.

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Latest Announcements

SEA-LION v4

Introducing our latest model family: a cutting-edge vision-text model and a stronger multilingual model designed for reasoning and language depth across Southeast Asia — Gemma-SEA-LION-v4-27B and Qwen-SEA-LION-v4-32B.

Find Out More

SEA-LION Summit @ AIMX

Be part of the inaugural SEA-LION Summit on 28 November 2025, 2 PM, as we bring together regional policymakers, developers, and innovators to demonstrate SEA-LION’s real-world applications and showcase the winners of our Pan-Southeast Asia AI Developer Challenge.

View event recap

Model Catalogue

Explore our family of models and see our latest release.

Explore Model

Aquarium Data Platform

Join our community-driven open data platform for Southeast Asia. Contribute and explore datasets powering future models.

Explore Aquarium

SEA-HELM Leaderboard

Track model performance and gain insights with SEA-HELM, assessing large language models across Southeast Asian languages, chat, instruction-following, regional tasks, and English capabilities.

View Leaderboard

Capabilities

Powering linguistic and cultural understanding across Southeast Asia

SEA-LION is designed to capture the intricate linguistic and cultural nuance of under-represented population groups and low resource languages across Southeast Asian communities.

Open & Collaborative

  • Fully open-source and community-driven
  • Framework-agnostic for research and commercial use

Regional Excellence

  • Complements existing models and benefits from SOTA models & fine-tuned on SEA data
  • Purpose-built to understand SEA cultures and contexts

Resource Efficient

  • High performance even on low infrastructure
  • Quantised models deployable on lightweight setups, like laptops

Multimodal

  • Supports both image and text inputs (audio soon)
  • Enables document comprehension, visual Q&A, and reasoning

Multilingual & Multicultural

  • Performant in over 11 Southeast Asian languages
  • Produces culturally aligned and context-aware outputs

Safe & Secure

  • Safety-tuned for SEA contexts
  • Aligned with human-curated data for reliable results

SEA-LION’s Guiding Principles

Choice

Users have the freedom to choose how to interact:

  • Closed vs Open
  • Build vs Buy
  • East vs West
  • Model
  • Independence

Open

Users have visibility on how it is being built:

  • Data
  • Models
  • Evaluations
  • Code Checkpoints

Responsible

Users understand the ethical reasoning behind how our models are:

  • Built
  • Aligned
  • Deployed

Inclusive

Users have a model that is relevant for their demographics:

  • Representative
  • Aligned
  • Collaborative