AionLabs: Aion 3.5

aion-labs/aion-3.5 · Aion LabsTokenizer lineage measured

Tokenizer group (measured): Aion Labs
Entered catalogue: 23 September 2026
Last tested: 5 October 2026
Evidence confidence: Very high

Why very high: an exact fingerprint shared with 1 model and an identical API contract inside the same group: two signals of different kinds agree.

Evidence

✓ exact tokenizer signature shared with 1 model
✓ API-surface contract identical to a group member

Compare with AionLabs: Aion 3.5 Mini

Report a correction

Identity statement

AionLabs: Aion 3.5 is Aion Labs's model, and its measured tokenizer sits in Aion Labs's own signature group alongside its sibling models. No other maker's measured model shares it so far.

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Counts every one of the 50 test strings exactly like 1 other model	tk_13620098
How its API is set up	Set up identically to 1 other listing, field for field	api_7d740c87
How much it can read and write	Reads up to 262,144 tokens at once, writes up to 32,768	its own listing
Whether it thinks before answering	Always reasons, and cannot be turned off, at max, high, low, high by default	its own listing
Who served our requests	AionLabs	we measured it, 5 October 2026

Shares this fingerprint

Exact signature first; template-boundary shifts of the same signature beneath

AionLabs: Aion 3.5 Miniaion-labs/aion-3.5-miniexact · 50/50

Closest measured models

Agreement across the mutually clean test strings

AionLabs: Aion 3.5 Miniaion-labs/aion-3.5-mini50/50 · 100%MiniMax: MiniMax-01minimax/minimax-016/50 · 12%MiniMax: MiniMax M2minimax/minimax-m26/50 · 12%MiniMax: MiniMax M2.5minimax/minimax-m2.56/50 · 12%MiniMax: MiniMax M3minimax/minimax-m36/50 · 12%MiniMax: MiniMax M2.7minimax/minimax-m2.76/50 · 12%

Click a row to open the full comparison.

The measured fingerprint

What each test string cost this model, in tokens

We sent AionLabs: Aion 3.5 fifty short pieces of text and recorded what each one cost it in tokens. The bars below are those costs. Two models built on the same tokenizer produce the same bars; a model built on a different one produces a different set, which is what makes this a fingerprint.

All 50 rows

English and whitespace

en-prose11

en-long13

spaces-201

spaces-601

tabs-201

newlines-201

mixed-ws2

Digits

digits-92

digits-124

digits-307

digits-sep6

float-long11

CJK

zh-common6

zh-long7

zh-rare15

ja-kana7

ja-kanji11

ko14

Other scripts

ru10

ar10

he21

hi24

th21

el11

Emoji

emoji-basic2

emoji-skin7

emoji-zwj-family4

emoji-zwj-x318

emoji-flags21

emoji-prof12

Rare Unicode

math24

boxdraw25

combining7

cjk-ext-b10

surrogates37

zalgo19

rtl-mix5

Code

py-code22

py-indent12

json18

html13

regex41

camel2

snake3

Repetition and encodings

rare-word-x528

repeat-tok19

base6432

hex11

url14

uuid25

Overhead subtracted: 7 prompt tokens.

Declared record

What the catalogue claims about this model

Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple specialized models each...

Modalities: text->text
Declared tokenizer: Other
Prompt price: $3.00 / M tokens
Completion price: $6.00 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formattemperaturetool_choicetoolstop_p

defaults: {}

Catalogue entry

History

Every observation, kept as taken

23 September 2026Enters the OpenRouter catalogue with no declared family.
5 October 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
5 October 2026YFarmX assessment: consistent with the Aion Labs family, very high confidence.