| # C4 Evaluation Dataset | |
| A multilingual subset of [allenai/c4](https://huggingface.co/datasets/allenai/c4) for measuring information-theoretic properties (perplexity, KL divergence) of LLMs. | |
| ## Dataset | |
| - **File:** `c4_evaluation.parquet` | |
| - **Total samples:** 2,994 | |
| - **Total tokens:** 2,007,152 (tokenized with `Qwen/Qwen3.5-35B-A3B`) | |
| - **Columns:** `text`, `language`, `source` | |
| ## Language Composition | |
| | Language | Code | Family | Samples | Tokens | % of tokens | | |
| |----------|------|--------|--------:|-------:|------------:| | |
| | English | `en` | Germanic | 1,244 | 695,908 | 34.7% | | |
| | Chinese | `zh` | Sino-Tibetan | 316 | 245,202 | 12.2% | | |
| | Japanese | `ja` | Japonic | 183 | 163,306 | 8.1% | | |
| | Spanish | `es` | Romance | 236 | 160,108 | 8.0% | | |
| | French | `fr` | Romance | 141 | 102,462 | 5.1% | | |
| | German | `de` | Germanic | 143 | 101,514 | 5.1% | | |
| | Korean | `ko` | Koreanic | 114 | 101,298 | 5.0% | | |
| | Russian | `ru` | Slavic | 152 | 99,622 | 5.0% | | |
| | Arabic | `ar` | Semitic | 141 | 99,938 | 5.0% | | |
| | Portuguese | `pt` | Romance | 128 | 80,766 | 4.0% | | |
| | Hindi | `hi` | Indo-Aryan | 95 | 78,244 | 3.9% | | |
| | Tamil | `ta` | Dravidian | 101 | 78,784 | 3.9% | |