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波多野结衣

The name of a Japanese adult-film actress — the emblematic polluted Chinese token of the PoC paper (EMNLP 2025).

Raw token

"波多野结衣"

Observed behaviors

  • 01GPT-4o/4.1/4.5 can neither explain it nor repeat it.arXivDemo
  • 02The authors estimate the related web pages account for roughly 0.5% of GPT-4o's Chinese training data.arXiv
Observed or documented on
GPT (OpenAI)
Behavior types
Unspeakable
Tokenizer
o200k_base
Discovered by
Zhang 等 (EMNLP 2025)

References