Publish reproducible 50M-token English pilot

README.md

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+---
+pretty_name: Tiny Base 300M English Pilot Tokens
+license: other
+language:
+- en
+tags:
+- pretraining
+- tokenized
+- english
+size_categories:
+- n<1GB
+---
+
+# Tiny Base 300M English Pilot Tokens
+
+This public pilot contains packed `uint16` token IDs for pretraining the Tiny Base 300M, 2,048-context language model. It contains **50,000,000 training**, **1,000,000 validation**, and **1,000,000 test** tokens. It does not redistribute raw documents.
+
+## Files and use
+
+`train.bin`, `validation.bin`, and `test.bin` are little-endian `uint16` streams. Use `tokenizer.json` with the Hugging Face `tokenizers` library. `manifest.json` records exact token counts, split policy, source revisions, mixture, and SHA-256 checksums; `settings.json` records preparation settings.
+
+The deterministic split is SHA-256 of normalized text modulo 1,000: 0–9 test, 10–19 validation, and 20–999 training.
+
+## Sources and provenance
+
+The mixture is 70% [FineWeb-Edu](https://huggingface.co/datasets/HuggingFaceFW/fineweb-edu), 25% [English Wikipedia](https://huggingface.co/datasets/wikimedia/wikipedia), and 5% [TinyStories](https://huggingface.co/datasets/roneneldan/TinyStories). Exact dataset revisions and the FineWeb configuration are pinned in `manifest.json`.
+
+Upstream terms remain applicable to this derived token dataset: FineWeb-Edu is distributed under ODC-By and subject to Common Crawl terms; English Wikipedia is CC BY-SA 3.0/GFDL; TinyStories is CDLA-Sharing-1.0. Users must review and comply with those terms, including applicable attribution and share-alike obligations.
+
+## Limitations
+
+This is a small, English-first pilot rather than a broadly representative corpus. It can carry source-data biases, inaccuracies, and copyrighted or otherwise problematic material. Do not treat it as a benchmark, safety filter, or factual authority.

manifest.json

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+{
+  "sources": {
+    "fineweb_edu": {
+      "dataset": "HuggingFaceFW/fineweb-edu",
+      "config": "CC-MAIN-2025-26",
+      "revision": "87f09149ef4734204d70ed1d046ddc9ca3f2b8f9",
+      "weight": 70
+    },
+    "english_wikipedia": {
+      "dataset": "wikimedia/wikipedia",
+      "config": "20231101.en",
+      "revision": "b04c8d1ceb2f5cd4588862100d08de323dccfbaa",
+      "weight": 25
+    },
+    "narrative": {
+      "dataset": "roneneldan/TinyStories",
+      "config": null,
+      "revision": "f54c09fd23315a6f9c86f9dc80f725de7d8f9c64",
+      "weight": 5
+    }
+  },
+  "mixture": {
+    "fineweb_edu": 0.7,
+    "english_wikipedia": 0.25,
+    "narrative": 0.05
+  },
+  "tokens": {
+    "train": {
+      "fineweb_edu": 35000000,
+      "english_wikipedia": 12500000,
+      "narrative": 2500000
+    },
+    "validation": {
+      "fineweb_edu": 700000,
+      "english_wikipedia": 250000,
+      "narrative": 50000
+    },
+    "test": {
+      "fineweb_edu": 700000,
+      "english_wikipedia": 250000,
+      "narrative": 50000
+    }
+  },
+  "vocab_size": 32768,
+  "dtype": "<u2",
+  "split_policy": "SHA256(normalized text) modulo 1000: test 0-9, validation 10-19, train 20-999",
+  "sha256": {
+    "train.bin": "8f18a017f3bb1adbff7f2bae7b84151a8d3899a4eeb4a6633223677f6c59e847",
+    "validation.bin": "252bf6986e18912565495e684d283a160c23c21fa8bbdfa6e5d9fcef30759282",
+    "test.bin": "e85fb2f775c5003e5087384ad27c5128008f4a95d8e5a5ca5547f9ee9c076930",
+    "tokenizer.json": "40d36acc35e5364d90fdcdae773143b7571b5ec3b7ace2030d12d4bd5a3a1025"
+  }
+}

settings.json

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+{
+  "stage": "preparing_data",
+  "target_tokens": 52000000,
+  "sources": {
+    "fineweb_edu": {
+      "dataset": "HuggingFaceFW/fineweb-edu",
+      "config": "CC-MAIN-2025-26",
+      "revision": "87f09149ef4734204d70ed1d046ddc9ca3f2b8f9",
+      "weight": 70
+    },
+    "english_wikipedia": {
+      "dataset": "wikimedia/wikipedia",
+      "config": "20231101.en",
+      "revision": "b04c8d1ceb2f5cd4588862100d08de323dccfbaa",
+      "weight": 25
+    },
+    "narrative": {
+      "dataset": "roneneldan/TinyStories",
+      "config": null,
+      "revision": "f54c09fd23315a6f9c86f9dc80f725de7d8f9c64",
+      "weight": 5
+    }
+  }
+}

test.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:e85fb2f775c5003e5087384ad27c5128008f4a95d8e5a5ca5547f9ee9c076930
+size 2000000

train.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:8f18a017f3bb1adbff7f2bae7b84151a8d3899a4eeb4a6633223677f6c59e847
+size 100000000

validation.bin

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+version https://git-lfs.github.com/spec/v1
+oid sha256:252bf6986e18912565495e684d283a160c23c21fa8bbdfa6e5d9fcef30759282
+size 2000000