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Specifications
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality.
671B253B
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.
128k128k
These models have no shared benchmark scores.
Overview
CompanyDeepSeekNVIDIA
Release dateDec 25 2024Apr 8 2025
AccessOpen WeightOpen Weight
Model detailsView modelView model

Frequently asked questions

DeepSeek V3 Base and Llama Nemotron Ultra 253B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V3 Base shipped 104 days before Llama Nemotron Ultra 253B, so benchmark comparisons should account for the intervening progress.

DeepSeek V3 Base has 671B parameters, while Llama Nemotron Ultra 253B has 253B. Context windows are 128k (DeepSeek V3 Base) vs 128k (Llama Nemotron Ultra 253B).

Direct benchmark comparisons are unavailable — DeepSeek V3 Base and Llama Nemotron Ultra 253B don't publish scores on any of the same benchmarks.