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AI Desk · Model IdentityNew arrival

DeepSeek: DeepSeek V4.1 Flash

deepseek/deepseek-v4.1-flash · DeepSeekNot yet established
Declared family
DeepSeek
Evidence confidence
Unknown
Declared tokenizer tag
DeepSeek
Entered catalogue
10 September 2026
Last tested
Not yet measured
Measurement
Awaiting measurement

Evidence stack

Signals of different kinds, weighed together
SignalResultReference
Tokenizer signatureNot measured
API surfaceNo other entry shares this exact contractapi_3b8e24fc
Context and output1,048,576 context · 384,000 max outputdeclared
Reasoning contractOptional · efforts max, high, low · default highdeclared
Serving providers observedNone recorded yet

Declared record

What the catalogue claims about this model

DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...

Modalities
text+image->text
Declared tokenizer
DeepSeek
Prompt price
$0.15 / M tokens
Completion price
$0.60 / 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
  • 10 September 2026Enters the OpenRouter catalogue declared as DeepSeek.

Cite this page as the evidence record for DeepSeek: DeepSeek V4.1 Flash: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.