Last updated 08-15-2026
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Ai2 (formerly Allen Institute for AI)
Ai2 is a nonprofit data science and AI research institute that builds fully open language and multimodal models, plus applied research platforms for science, climate, and robotics. Founded by Paul Allen in 2014 and based in Seattle, the institute publishes model weights, training data, code, and evaluation recipes rather than closed APIs alone.
Where many labs release weights but hide data and training steps, Ai2 treats the whole model lifecycle as public. Olmo 3 ships base, instruct, and think variants up to 32B parameters with OlmoCore, Open Instruct, and preprocessing tools. Tülu 3 and Molmo 2 extend that openness into post-training and vision-language research.
Researchers, ML engineers, and academic teams use Ai2 when they need reproducible foundations instead of black-box endpoints. The work spans language models, multimodal models, Semantic Scholar, Asta for scientific discovery, and planet-focused tools like EarthRanger and Skylight.
Olmo 3 family with 7B and 32B base, instruct, and think variants plus the full training pipeline
Tülu 3 open data, SFT, DPO, and RLVR recipes for instruction-tuned models
Molmo 2 multimodal models at 4B, 8B, and O-7B for image, video, and pointing tasks
Open Instruct and OlmoCore frameworks for post-training and large-scale training
Asta AutoDiscovery in AstaLabs for hypothesis generation and scientific data exploration
Semantic Scholar and applied AI projects for science, climate, and conservation
Publishes weights, training data, code, and evals for Olmo, Tülu, and Molmo
Olmo 3 covers base, instruct, and think variants up to 32B parameters
Strong research credibility with NSF, UW, and Google Cloud partnerships
Applied platforms like Semantic Scholar and Asta extend beyond model releases
Nonprofit mission focused on open, reproducible AI research
No managed commercial API; teams must self-host and operate models
Running 32B Olmo or Molmo 8B models needs substantial GPU hardware
Applied science tools like AstaLabs may have separate access terms
Documentation spans many projects, so onboarding takes research time
What is Ai2?
Ai2 is a Seattle-based nonprofit AI research institute founded in 2014 by Paul Allen. Ai2 builds fully open language and multimodal models, publishes training data and code, and runs applied research for science, climate, and robotics.
What open models does Ai2 release?
Ai2 releases the Olmo language model family, Tülu 3 instruction models, Molmo multimodal models, and OLMoE mixture-of-experts models. Ai2 shares weights, datasets, training recipes, and evaluation code for each line.
How is Olmo 3 different from typical open models?
Olmo 3 from Ai2 exposes the full model flow, including pretraining data, mid-training sets, post-training corpora, and tools like OlmoCore and Open Instruct. Ai2 publishes 7B and 32B base, instruct, and think checkpoints rather than weights alone.
Does Ai2 charge for its models?
Ai2 releases its open models, datasets, and research code without commercial licensing fees. Ai2 is a nonprofit institute, so researchers and developers can download Olmo, Tülu, and Molmo artifacts from Ai2 pages and Hugging Face.
What applied AI projects does Ai2 run?
Beyond foundation models, Ai2 builds tools like Semantic Scholar, Asta for scientific discovery, EarthRanger for wildlife conservation, Skylight for maritime monitoring, and embodied AI research. Ai2 groups these under AI for science, the planet, and robotics.
Where is Ai2 headquartered?
Ai2 is headquartered in Seattle, Washington, United States. Ai2 partners with the University of Washington Allen School, the National Science Foundation, and Google Cloud on large-scale open AI research.