Compare AI models

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.
8B/49B—
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.
128k2M
These models have no shared benchmark scores.
Overview
CompanyNVIDIASpaceXSI
Release dateMar 18 2025Nov 19 2025
AccessOpen WeightClosed
Model detailsView modelView model

Frequently asked questions

Llama Nemotron (Nano/Super) and Grok 4.1 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Llama Nemotron (Nano/Super) shipped 246 days before Grok 4.1 Fast, so benchmark comparisons should account for the intervening progress.

Context windows are 128k (Llama Nemotron (Nano/Super)) vs 2M (Grok 4.1 Fast). Llama Nemotron (Nano/Super) is open weight, while Grok 4.1 Fast is closed.

Direct benchmark comparisons are unavailable — Llama Nemotron (Nano/Super) and Grok 4.1 Fast don't publish scores on any of the same benchmarks.