Ai2’s fully open approach, which includes data, training code and models, ensures users can easily customize their pipeline for everything from data selection through evaluation.
The company points out that Tülu 3 and Ai2’s other models are fully open source, noting that big model trainers like Anthropic and Meta, who claim to be open source, have “none of their training data nor training recipes are transparent to users.” The Open Source Initiative recently published the first version of its open-source AI definition, but some organizations and model providers don’t fully follow the definition in their licenses.
The Open Source Initiative, which defines what makes something open source and promotes it, has begun tackling what open source means for AI models.
