Update README.md

README.md

@@ -445,23 +445,48 @@ configs:
 
 # Reactive AI / Beta Pre-Train Corpus
 Pre-training corpus for RxT-Beta models, created from public & open datasets. Includes high-quality english and polish web crawl data, mathematic and scientific subsets,
-and code in different programming languages
+and code in different programming languages.
+
+`2k` subsets are filtered for 1024-2048 tokens, except MegaMath Web Pro and GitHub Code subsets, that were filtered for 512-2048 tokens
 
 ## Subsets & original datasets
 - [FineWeb-Edu](https://huggingface.co/datasets/HuggingFaceFW/fineweb-edu)
   - `fineweb-edu-s100` (51.3M examples) - 50% of 'sample-100BT' subset
   - `fineweb-edu-2025-26` (14M examples) - CC-MAIN-2025-26 subset - latest crawl
+  - `fineweb-edu-s100-sh3-2k` (4.69M examples) - third 25% of 'sample-100BT' subset filtered for 1024-2048 tokens examples
+  - `fineweb-edu-s100-sh4-2k` (3.90M examples) - fourth 25% of 'sample-100BT' subset filtered for 1024-2048 tokens examples
+  - `fineweb-edu-2025-08-2k` (3.77M examples) - CC-MAIN-2025-08 subset, filtered for 1024-2048 tokens examples
+  - `fineweb-edu-2025-13-2k` (3.95M examples) - CC-MAIN-2025-13 subset, filtered for 1024-2048 tokens examples
+  - `fineweb-edu-2025-18-2k` (4.13M examples) - CC-MAIN-2025-18 subset, filtered for 1024-2048 tokens examples
+  - `fineweb-edu-2025-21-2k` (3.76M examples) - CC-MAIN-2025-21 subset, filtered for 1024-2048 tokens examples
 - [FineWiki](https://huggingface.co/datasets/HuggingFaceFW/finewiki)
   - `finewiki-en` (6.6M examples) - english wikipedia subset
   - `finewiki-pl` (1.5M examples) - polish wikipedia subset
+- [FineWeb](https://huggingface.co/datasets/HuggingFaceFW/fineweb)
+  - `fineweb-s10-2k` (1.73M examples) - 'sample-10BT' subset, filtered for 1024-2048 tokens examples
 - [FineWeb2-HQ](https://huggingface.co/datasets/epfml/FineWeb2-HQ)
   - `fineweb2-hq-pl` (13.3M examples) - high-quality filtered polish web crawl
+- [FineWeb-2](https://huggingface.co/datasets/HuggingFaceFW/fineweb-2)
+  - `fineweb2-pl-2k` (2.13M examples) - latest 30% of polish subset, filtered for 1024-2048 tokens examples
+- [DCLM-Edu](https://huggingface.co/datasets/HuggingFaceTB/dclm-edu)
+  - `dclm-edu-2k` (3.59M examples) - examples filtered for 3 and higher educational score and 1024-2048 tokens
+- [FinePdfs-Edu](https://huggingface.co/datasets/HuggingFaceFW/finepdfs-edu)
+  - `finepdfs-edu-en-2k` (4.38M examples) - english subset filtered for 1024-2048 tokens
+  - `finepfds-edu-pl-2k` (0.18M examples) - polish subset filtered for 1024-2048 tokens (not used, as it's duplicated in base `finepdfs-pl-2k`)
+- [FinePdfs](https://huggingface.co/datasets/HuggingFaceFW/finepdfs)
+  - `finepfds-pl-2k` (1.65M examples) - polish subset filtered for 1024-2048 tokens
 - [FineMath](https://huggingface.co/datasets/HuggingFaceTB/finemath)
-  - `finemath-4plus` (6.7M examples)
-  - `infiwebmath-4plus` (6.3M examples)
+  - `finemath-4plus` (6.7M examples) - full subset with best math quality
+  - `infiwebmath-4plus` (6.3M examples) - full subset with best math quality
+- [MegaMath](https://github.com/LLM360/MegaMath)
+  - `megamath-web-pro-2k` (5.38M examples) - filtered for 512-2048 tokens MegaMath Web Pro subset
 - [ProofPile-2](https://huggingface.co/datasets/EleutherAI/proof-pile-2)
   - `pp2-arxiv` (4M examples) - arXiv research papers
+  - `pp2-algebraic-stack` (3.37M examples) - mathematic code examples
 - Notebooks:
   - `kaggle` (0.58M examples) - from [HuggingFaceTB/issues-kaggle-notebooks](https://huggingface.co/datasets/HuggingFaceTB/issues-kaggle-notebooks)
   - `github-jupyter` (0.05M examples) - from [codeparrot/github-jupyter-code-to-text](https://huggingface.co/datasets/codeparrot/github-jupyter-code-to-text)
-
+  - `notebooks-all` (0.63M examples) - `kaggle` and `github-jupyter` combined
+- Code:
+  - `beta-code-short` (4.51M examples) - filtered and combined code from [codeparrot/codeparrot-clean](https://huggingface.co/datasets/codeparrot/github-jupyter-code-to-text) and [codeparrot/github-code-clean](https://huggingface.co/datasets/codeparrot/github-code-clean)
+  - `github-code-clean-small-2k` (8.17M examples) - filtered for 512-2048 tokens code from [loubnabnl/github-code-clean-small](https://huggingface.co/datasets/loubnabnl/github-code-clean-small)