Retrofitted LLM can count the letter ‘i’s in ‘artificial intelligence’

Nature, Published online: 07 October 2026; doi:10.1038/d41586-026-03059-2Most LLMs cannot reliably evaluate text on the level of individual letters. A technique called byteification retrofits existing models to enable it.

SINSIN
Oct 8, 2026 - 02:00
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Retrofitted LLM can count the letter ‘i’s in ‘artificial intelligence’

Nature, Published online: 07 October 2026; doi:10.1038/d41586-026-03059-2Most LLMs cannot reliably evaluate text on the level of individual letters. A technique called byteification retrofits existing models to enable it.

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