Allen Institute for AI (Ai2)

The Allen Institute for AI (Ai2) is a non-profit research institute founded in 2014 by Microsoft co-founder Paul Allen, headquartered in Seattle: "Our mission? Building breakthrough AI to solve the world's biggest problems."

Ai2 is committed to truly open AI — releasing not just model weights, but full training code, data, and infrastructure to advance the science of AI.

Ai2 develops and ships:

• OLMo — a family of fully open large language models with published training data, code, and intermediate checkpoints.
• Molmo — state-of-the-art open multimodal AI models for vision-language tasks.
• Tülu — instruction-tuned models and post-training recipes for LLMs.
• Asta — an agentic AI ecosystem for accelerating scientific discovery.

Applications

• AI for Science — Asta agents, AstaBench, Semantic Scholar
• AI for the Planet — OlmoEarth, EarthRanger, Skylight, Climate Modeling
• Embodied AI — Robotics and 3D reasoning research

Notable Models

• OLMo 3.1 32B Think (Dec 2025)
• OLMo 3.1 32B Instruct (Dec 2025)
• Molmo2-8B (Dec 2025)
• Molmo2-4B (Dec 2025)
• Bolmo-7B (Dec 2025)

Links

• Website: allenai.org
• Playground: playground.allenai.org
• Semantic Scholar: semanticscholar.org
• Hugging Face: huggingface.co/allenai
• GitHub: github.com/allenai
• X (Twitter): @allen_ai
• LinkedIn: Allen Institute for AI
• Discord: Ai2 Community
• Bluesky: @ai2.bsky.social
• Reddit: r/allenai