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<think_never_used_51bce0c785ca2f68081bfa7d91973934>

A special token in Doubao's vocabulary: a <think_never_used_ prefix followed by a hash — judging by the name, likely a reserved placeholder prefilled into the vocabulary before training (akin to GPT-J's reserved <|extratoken_xx|> slots). The Zhihu source gives no further detail, listing it simply as a Doubao dirty token.

Raw token

"<think_never_used_51bce0c785ca2f68081bfa7d91973934>"

Observed behaviors

  • 01A fingerprint token from the Zhihu community's “dirty-token” method for detecting watered-down LLM APIs: send it as input to the API under test — refusals, gibberish, or abnormal output suggest the service is actually running Doubao.zhihu.com
Observed or documented on
Doubao (ByteDance)
Behavior types
Fingerprint
Discovered by
@小看山xrsWv4D (Zhihu)

References