Base Labs releases open-weight mammoth-1 and elephant-1 decision models

Base Labs releases mammoth-1 and elephant-1 as open-weight decision models, publishing all model weights and a technical report on its training and data methods.

The company says mammoth-1 ranks first among decision models worldwide and that elephant-1 is the best model under 15 billion parameters, outperforming Jev. These claims come from Dongxi NLP's post on X, which relays Base Labs' statements; no independent benchmark results are cited in the report.