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AI Desk · Model Identity

DeepSeek: DeepSeek V4 Flash Vision Exp

deepseek/deepseek-v4-flash-vision-exp · DeepSeekDeclared and measured agree
Tokenizer group (measured)
DeepSeek
Evidence confidence
High
Why high: an exact fingerprint shared with 12 models that declare the same family, without a second signal of a different kind yet.
Declared tokenizer tag
DeepSeek
Entered catalogue
21 August 2026
Last tested
3 September 2026
Measurement
Measured
Evidence
  • ✓ exact tokenizer signature shared with 12 models
Compare with DeepSeek: DeepSeek V4 Pro 0813

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Identity statement

DeepSeek: DeepSeek V4 Flash Vision Exp is DeepSeek's model, and its measured tokenizer sits in DeepSeek's own signature group alongside its sibling models. Measured models from StepFun carry the same vocabulary, which reads as reuse of DeepSeek's tokenizer line and questions nobody's authorship; they are listed under "Shares this fingerprint" below.

Evidence stack

Signals of different kinds, weighed together
SignalResultReference
Tokenizer signatureExact match with 12 other modelstk_73c4f0dc
API surfaceNo other entry shares this exact contractapi_31761098
Context and output1,048,576 context · 943,718 max outputdeclared
Reasoning contractOptional · efforts max, high, low · default highdeclared
Serving providers observedFireworksmeasured 3 September 2026

Shares this fingerprint

Exact signature first; template-boundary shifts of the same signature beneath
DeepSeek: DeepSeek V3deepseek/deepseek-chatexact · 50/50DeepSeek: DeepSeek V3 0324deepseek/deepseek-chat-v3-0324exact · 50/50DeepSeek: R1 0528deepseek/deepseek-r1-0528exact · 50/50DeepSeek: DeepSeek V3.1 Terminusdeepseek/deepseek-v3.1-terminusexact · 50/50DeepSeek: DeepSeek V3.2deepseek/deepseek-v3.2exact · 50/50DeepSeek: DeepSeek V3.2 Expdeepseek/deepseek-v3.2-expexact · 50/50DeepSeek: DeepSeek V4 Flash 0423deepseek/deepseek-v4-flashexact · 50/50DeepSeek: DeepSeek V4 Flash 0731deepseek/deepseek-v4-flash-0731exact · 50/50DeepSeek: DeepSeek V4 Pro 0423deepseek/deepseek-v4-proexact · 50/50DeepSeek: DeepSeek V4 Pro 0813deepseek/deepseek-v4-pro-0813exact · 50/50StepFun: Step 3.5 Flashstepfun/step-3.5-flashexact · 50/50StepFun: Step 3.7 Flashstepfun/step-3.7-flashexact · 50/50DeepSeek: DeepSeek V3.1deepseek/deepseek-chat-v3.1same tokenizer · template shiftDeepSeek: R1 Distill Llama 70Bdeepseek/deepseek-r1-distill-llama-70bsame tokenizer · template shift

Closest measured models

Agreement across the mutually clean test strings
DeepSeek: DeepSeek V4 Pro 0813deepseek/deepseek-v4-pro-081350/50 · 100%DeepSeek: DeepSeek V4 Flash 0731deepseek/deepseek-v4-flash-073150/50 · 100%DeepSeek: DeepSeek V4 Flash 0423deepseek/deepseek-v4-flash50/50 · 100%StepFun: Step 3.5 Flashstepfun/step-3.5-flash50/50 · 100%StepFun: Step 3.7 Flashstepfun/step-3.7-flash50/50 · 100%DeepSeek: DeepSeek V3.2deepseek/deepseek-v3.250/50 · 100%

Click a row to open the full comparison.

The measured fingerprint

Marginal prompt-token cost of each test string, grouped by script
All 50 rows

English and whitespace

en-prose14
en-long16
spaces-203
spaces-603
tabs-204
newlines-204
mixed-ws7

Digits

digits-93
digits-124
digits-3010
digits-sep7
float-long9

CJK

zh-common9
zh-long10
zh-rare18
ja-kana9
ja-kanji11
ko13

Other scripts

ru13
ar10
he14
hi18
th11
el16

Emoji

emoji-basic10
emoji-skin14
emoji-zwj-family11
emoji-zwj-x333
emoji-flags16
emoji-prof19

Rare Unicode

math22
boxdraw27
combining10
cjk-ext-b16
surrogates33
zalgo36
rtl-mix6

Code

py-code25
py-indent15
json20
html16
regex47
camel7
snake8

Repetition and encodings

rare-word-x526
repeat-tok41
base6434
hex12
url17
uuid27

An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 83 prompt tokens.

Declared record

What the catalogue claims about this model

DeepSeek V4 Flash Vision Exp is an experimental vision-enabled version of [DeepSeek V4 Flash 0731](https://openrouter.ai/deepseek/deepseek-v4-flash-0731) from DeepSeek, adding image understanding while matching the base model on text capabilities including agents,...

Modalities
text+image->text
Declared tokenizer
DeepSeek
Prompt price
$0.22 / M tokens
Completion price
$0.66 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

defaults: {}

Catalogue entryWeights on Hugging Face

History

Every observation, kept as taken
  • 21 August 2026Enters the OpenRouter catalogue declared as DeepSeek.
  • 3 September 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 3 September 2026YFarmX assessment: consistent with the DeepSeek family, high confidence.

Cite this page as the evidence record for DeepSeek: DeepSeek V4 Flash Vision Exp: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.