About
OLMo (Open Language Model) is a family of fully open language models developed by the Allen Institute for AI (Ai2). Unlike 'open weights' models, Ai2 releases the full stack: weights, training data (the Dolma corpus), training code, and recipes, enabling complete reproducibility. Successive generations (OLMo, OLMo 2, OLMo 3) expand scale, context length, and reasoning capabilities.