This is a RoBERTa-base model trained from scratch in Spanish.
The training dataset is mc4 (1) subsampling documents to a total of about 50 million examples. Sampling is random. This model takes the one using sequence length 128 (2) and trains during 25.000 steps using sequence length 512.
(1) https://huggingface.co/datasets/bertin-project/mc4-es-sampled
(2) https://huggingface.co/bertin-project/bertin-base-random