placeholderlabs/pretrain-academic-mix-long-context

Normalized documents plus aligned Dolma-2 tokens and target masks. Size Tokens 43,694,042,993 (43.7B) Trainable tokens 43,694,042,993 (43.7B) Documents 1,001,557 Shards 373 UTF-8 bytes 183,279,720,921 Tokenizer allenai/dolma2-tokenizer@5292e5d6c0f4 documents.parquet - document_id, text, part_ends, part_trainable, must_not_split. The readable payload and the mask intent. metadata.parquet - one text-free row per document: token span, source, stratum… See the full description on the dataset page: https://huggingface.co/datasets/placeholderlabs/pretrain-academic-mix-long-context.

<iframe src="https://silytics.si/embed/item/f51a84b3-1a72-49b8-bb12-8294b4acc72d" width="420" height="190" style="border:0" loading="lazy" title="Silytics entry"></iframe>

Silytics shows public metadata from Hugging Face and links to the original. Information may be incomplete or out of date. Last refreshed 17 October 2026. Licenses and terms of the original apply to the work itself. Not financial, legal or professional advice.