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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.
—253B
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.
1M128k
These models have no shared benchmark scores.
Overview
CompanyMetaNVIDIA
Release dateOct 12 2026Apr 8 2025
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Muse Wonder Full and Llama Nemotron Ultra 253B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Llama Nemotron Ultra 253B shipped 552 days before Muse Wonder Full, so benchmark comparisons should account for the intervening progress.

Context windows are 1M (Muse Wonder Full) vs 128k (Llama Nemotron Ultra 253B). Muse Wonder Full is closed, while Llama Nemotron Ultra 253B is open weight.

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