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Rate-Utility Frontiers for Language Encodings: Comparing Tokens, Bytes, and Pixels Under Controlled Linguistic Content

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TL;DR - This study compares token, byte, and pixel text encodings under controlled linguistic content and downstream capacity. It finds no universally superior encoding; effectiveness depends on the task, languages, capacity, and compute budget.

  • Tests verified parallel sentences across 13 languages and five scripts using a shared, variable-width bottleneck.
  • Pixels best preserve surface form, while bytes best retain cross-lingual alignment, particularly for same-script languages.
  • Tokens perform best for topic classification.
  • Sequence length alone does not explain utility: longer representations may preserve highly compressible information, while shorter ones can lose meaning.

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Rate-Utility Frontiers for Language Encodings: Comparing Tokens, Bytes, and Pixels Under Controlled Linguistic Content

arXiv cs.CL Ingo Ziegler, Martin Krebs, Desmond Elliott 2026-07-17 arXiv:2607.16117
Public signals Semantic Scholar citations 0 · Semantic Scholar influential citations 0
Providers: Hugging Face · N/A OpenAlex · N/A Publisher · N/A Semantic Scholar · Citations 0 · Influential citations 0 X · N/A Fetched 2026-08-18 14:39:14.920861 UTC

TL;DR - This study compares token, byte, and pixel text encodings under controlled linguistic content and downstream capacity. It finds no universally superior encoding; effectiveness depends on the task, languages, capacity, and compute budget.

  • Tests verified parallel sentences across 13 languages and five scripts using a shared, variable-width bottleneck.
  • Pixels best preserve surface form, while bytes best retain cross-lingual alignment, particularly for same-script languages.
  • Tokens perform best for topic classification.
  • Sequence length alone does not explain utility: longer representations may preserve highly compressible information, while shorter ones can lose meaning.
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