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Language model

DeepSeek V4 Pro 0423

DeepSeek

Released
April 23, 2026
Data date
September 26, 2026

DeepSeek V4 Pro 0423 is recorded in the directory as a catalog entry dated April 23, 2026. DeepSeek dates the public V4 announcement to April 24, so this entry is a catalogued initial snapshot, not automatically a separately confirmed weight release. The date distinguishes it from the later DeepSeek V4 Pro 0813.

The catalogued entry is therefore useful for historical model comparisons but limited for current API claims. DeepSeek later changed V4-Pro API and routing behavior. Treat this catalog entry as a concrete dated model identity, not proof that a provider still serves exactly these weights today.

Profile

Specifications and access

Published information about this model. Existing estimates are explicitly labeled.

SpecificationValue and source
Weights
Open weightsSource
Access
APISource
Parameters
1,600 billionSource
Active parameters
49 billionSource
Context window
1,000,000 tokensSource
Maximum output
384,000 tokensSource
Knowledge Cutoff
May 2025Source
License
MITSource
Inputs
TextSource
Outputs
TextSource
Reasoning
YesSource
Tool calling
YesSource