Parity-aware BPE, which prioritizes the worst-compressed language at each merge, cuts cross-lingual tokenization inequality by up to 89% at negligible global cost.
Locally testable codes with constant rate, distance, and locality
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Parity-Aware Byte-Pair Encoding: Improving Cross-lingual Fairness in Tokenization
Parity-aware BPE, which prioritizes the worst-compressed language at each merge, cuts cross-lingual tokenization inequality by up to 89% at negligible global cost.