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. | 9B | — |
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. | 128k | 2M |
| These models have no shared benchmark scores. | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 5% | — |
LiveCodeBenchCompetitive coding — Coding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | 71.1% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 64% | — |
| Overview | ||
| Company | NVIDIA | SpaceXSI |
| Release date | Aug 18 2025 | Sep 19 2025 |
| Access | Open Weight | Closed |
| Model details | View model | View model |
Other comparisons
Nemotron Nano 2vsClaude Haiku 5.5Grok 4 FastvsClaude Haiku 5.5Nemotron Nano 2vsGPT-6.1 SolGrok 4 FastvsGPT-6.1 SolNemotron Nano 2vsGemini 4 ArgonGrok 4 FastvsGemini 4 ArgonNemotron Nano 2vsMuse Spark OpenGrok 4 FastvsMuse Spark OpenNemotron Nano 2vsDeepSeek-V4.1-Flash-1017Grok 4 FastvsDeepSeek-V4.1-Flash-1017Nemotron Nano 2vsMistral Large 4Grok 4 FastvsMistral Large 4Frequently asked questions
Nemotron Nano 2 and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Nemotron Nano 2 shipped 32 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (Nemotron Nano 2) vs 2M (Grok 4 Fast). Nemotron Nano 2 is open weight, while Grok 4 Fast is closed.
Direct benchmark comparisons are unavailable — Nemotron Nano 2 and Grok 4 Fast don't publish scores on any of the same benchmarks.