Open language models with training data, code, recipes, and checkpoints for studying and adapting model behavior.
Ai2's Olmo project opens the process of building a language model as well as the resulting weights. Training data, code and reports are part of a model flow that researchers can inspect and adapt. The family includes base, reasoning and instruction-tuned variants at different sizes. That structure lets people study stages of model development and choose a starting point for their own experiments.
PyTorch
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