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AI Desk · AI Fingerprinting · Evidence object

Tokenizer signature tk_f0deddce

An exact tokenizer signature: every model listed below returned the same marginal prompt-token count on all 50 test strings. Sharing a signature is strong evidence of a shared vocabulary. This signature sits in the Gemini · group C group.

Members
1
First observed
14 October 2026
Last observed
14 October 2026
Group
Gemini · group C

Models with this signature

The measured vector

Marginal prompt-token cost per string, as measured on Google: Gemini 4 Argon
All 50 rows

English and whitespace

en-prose13
en-long15
spaces-203
spaces-604
tabs-203
newlines-203
mixed-ws9

Digits

digits-99
digits-1212
digits-3030
digits-sep12
float-long22

CJK

zh-common9
zh-long12
zh-rare23
ja-kana7
ja-kanji9
ko10

Other scripts

ru9
ar10
he12
hi9
th8
el13

Emoji

emoji-basic5
emoji-skin10
emoji-zwj-family5
emoji-zwj-x315
emoji-flags7
emoji-prof10

Rare Unicode

math24
boxdraw17
combining9
cjk-ext-b16
surrogates21
zalgo21
rtl-mix6

Code

py-code28
py-indent18
json28
html14
regex45
camel6
snake11

Repetition and encodings

rare-word-x520
repeat-tok20
base6431
hex16
url23
uuid36

Method: tokenizer fingerprinting, v1-50.