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Nemotron 3 Ultra vs DeepSeek V4.1 Flash

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Open-Weight Models · verified 13 Sept 2026

Nemotron 3 UltraNVIDIAcurrent
DeepSeek V4.1 FlashDeepSeekcurrent
3 slots left
SpecificationNemotron 3 UltraDeepSeek V4.1 Flash
SummaryNear the top of the open intelligence indices.Twice the parameters of the Flash it replaces, and cheaper to run.
Context1M1M
Input ($/Mtok)—$0.3
Output ($/Mtok)—$1.2
LicenceNVIDIA Open ModelMIT
Max output—256K
Parameters—552B total, 8B / 16B active
Released—10 Sep 2026
Model ID—deepseek-flash
CategoryOpen-Weight ModelsOpen-Weight Models
OfficialNVIDIA ↗DeepSeek ↗

Highlighted rows are where these differ.

Nemotron 3 Ultra

  • Ships under NVIDIA's own Open Model License — read it before shipping

Best for consumer GPUs.

Full spec sheet →

DeepSeek V4.1 Flash

  • 552B total, 8B active while reading the prompt and 16B while generating, with a 1M token context
  • DeepSeek says it beats V4-Pro; V4-Pro requests route to it from 14 September 2026
  • MIT licence, native image input, and a KV cache about a quarter the size of V4-Flash's

Best for cheap agentic coding with images.

Full spec sheet →