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Qwen: Qwen3.8 Omni Flash

qwen/qwen3.8-omni-flash · Alibaba (Qwen)Declared and measured agree
Tokenizer lineage (measured)
Qwen
Declared tokenizer tag
Qwen
Entered catalogue
21 September 2026
Last tested
5 October 2026
Evidence confidence
Moderate

Why moderate: near-exact agreement (49 of 49 strings) with qwen/qwen3.8-27b, short of a full exact signature.

Evidence
  • ✓ near-exact agreement (49/49) with qwen/qwen3.8-27b

Identity statement

Qwen: Qwen3.8 Omni Flash is Alibaba (Qwen)'s model. Its measured tokenizer sits with the Qwen group, which is evidence that it builds on the Qwen tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Alibaba (Qwen)'s authorship of the model itself.

What we checked

Four different kinds of evidence, and what each one showed
We checkedWhat we foundWhere it came from
How it counts tokensCounted, using the 49 strings that came back reliablywe measured it
How its API is set upSet up identically to 2 other listings, field for fieldapi_040089fb
How much it can read and writeReads up to 1,000,000 tokens at once, writes up to 131,072its own listing
Whether it thinks before answeringReasons when asked toits own listing
Who served our requestsAlibabawe measured it, 5 October 2026

Closest measured models

Agreement across the mutually clean test strings

Click a row to open the full comparison.

The measured fingerprint

What each test string cost this model, in tokens

We sent Qwen: Qwen3.8 Omni Flash 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, 1 excluded as corrupt

English and whitespace

en-prose14
en-long16
spaces-203
spaces-603
tabs-203
newlines-204
mixed-ws5

Digits

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

CJK

zh-common9
zh-long10
zh-rarex
ja-kana7
ja-kanji10
ko13

Other scripts

ru12
ar10
he14
hi20
th12
el13

Emoji

emoji-basic9
emoji-skin30
emoji-zwj-family18
emoji-zwj-x354
emoji-flags24
emoji-prof29

Rare Unicode

math29
boxdraw28
combining5
cjk-ext-b13
surrogates40
zalgo36
rtl-mix6

Code

py-code26
py-indent18
json25
html16
regex44
camel5
snake6

Repetition and encodings

rare-word-x530
repeat-tok21
base6436
hex17
url19
uuid36

An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 52 prompt tokens.

Declared record

What the catalogue claims about this model

Qwen3.8 Omni Flash is an omni-modal reasoning model from Alibaba, the first Qwen model built around agentic capabilities with native audio-video understanding. It is suited for audio-video analysis and summarization,...

Modalities
text+image+audio+video->text
Declared tokenizer
Qwen
Prompt price
$0.15 / M tokens
Completion price
$0.47 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogprobsmax_tokenspresence_penaltyreasoningresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

defaults: {}

Catalogue entry

History

Every observation, kept as taken
  • 21 September 2026Enters the OpenRouter catalogue declared as Qwen.
  • 5 October 2026Fingerprinted in the YFarmX catalogue sweep · 49 of 50 strings measured clean.
  • 5 October 2026YFarmX assessment: consistent with the Qwen family, moderate confidence.