GPT (OpenAI)

Ubiquitous Chinese guestbook/comment-form boilerplate (“leave something for the host”), with a trailing space. Listed by the Zhihu community as a GPT dirty token.

A Chinese “encyclopedia”-style boilerplate fragment. An o200k glitch token that still works in the GPT-5 era, without the typical spam-pollution profile — its cause is unknown.

A nonsense string suspected to originate from a Reddit username; a glitch token in the o200k vocabulary.

The Yoruba word for “always” (with a leading space), an o200k glitch token adjacent to `bagbogbo`.

Chinese guestbook boilerplate (the form without the trailing space); an o200k glitch token.

A Chinese porn-spam title fragment (with a leading space), emblematic of GPT-4o's vocabulary pollution; “fixed” by GPT-5.

The Abkhaz word for “population”. An o200k under-trained token located via embedding norms in the open GPT-oss weights.

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

Literally “green grass”, actually the name of a porn app — a typical polluted (PoC) token as defined by the PoC paper.

A C function-name fragment, called by the author “the weirdest pure-ASCII token”.

A C escape-sequence fragment (backslash + x, resembling a hex escape \x..).

A run of four Venus/female symbols (♀), likely a fragment of astronomy/astrology text.