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36f030a78f7d1ea441e1f163d4905149fd24ac1a349b753437eb1bd4d3d16d69
midtrain_schedule_holdout
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[ 110568, 134449, 536378, 160275, 162339, 91183, 170485, 420924, 525656, 609738, 709788, 3418, 670502, 38442, 299830, 57491, 521563, 587091, 136760, 77601, 449829, 520839, 239082, 254713, 274927, 139494, 85210, 127748, 536163, 485143, 474243, 494667, 588...
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../midtrain-240m

Unified Training: midtraining data

Tokenized midtraining data of the real-world (0.76B) experiments in Training Foundation Models with a Single Algorithm. The models are in the model repo sfanm/unified-training.

Folder Paper item Description
realworld/midtrain-240m Sec. 5.2, App. D.1-D.3, D.5, E 240M-token midtraining corpus with 24 components (web text, mathematics, code, question answering, reasoning traces)
realworld/midtrain-code-removed App. D.4 corpus variant without its three designated code sources (180M tokens)
realworld/midtrain-code-replaced App. D.4 corpus variant whose code allocation is execution-tested Python answers in chat format with assistant-only loss (240M supervised tokens)
realworld/midtrain-val-holdout App. E 512 held-out windows for the trainer's midtraining validation loss
realworld/heldout-loss-slices App. D.1 held-out documents of the 24 components for the held-out corpus loss

Format

The first four folders use the trainer's round format: tokens.bin (int32 token ids), weights.bin (float32 per-token loss weights), index.npy (offset and length of each episode), manifest.json (counts, token totals, component weights, hashes) and an empty DONE marker. heldout-loss-slices holds one <component>.npz per component (tokens, offsets) and a manifest.json with the component weights. All token ids use the GPT-2 BPE tokenizer of the models.

Download one folder: huggingface-cli download sfanm/unified-training --repo-type dataset --include "realworld/midtrain-240m/*" --local-dir $DATA_DIR. The manifest of midtrain-val-holdout refers to ../midtrain-240m, so download both into the same directory.

License and citation

Released under the Apache-2.0 license. Derived from allenai/dolma3_dolmino_mix-100B-1025 (ODC-By 1.0); midtrain-code-replaced also contains Python answers from nvidia/OpenCodeInstruct (CC BY 4.0). The training corpora were decontaminated against the evaluation benchmarks. Citation: to be added. This card was prepared with AI assistance (Claude, an Anthropic model).

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