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. | — | 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. | 200k | 128k |
| These models have no shared benchmark scores. | ||
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. | — | 66.3% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 76% |
| Overview | ||
| Company | Anthropic | NVIDIA |
| Release date | Nov 21 2023 | Apr 8 2025 |
| Access | Closed | Open Weight |
| Model details | View model | View model |
Other comparisons
Claude 2.1vsGPT-6.1 SolLlama Nemotron Ultra 253BvsGPT-6.1 SolClaude 2.1vsGemini 4 ArgonLlama Nemotron Ultra 253BvsGemini 4 ArgonClaude 2.1vsMuse Spark OpenLlama Nemotron Ultra 253BvsMuse Spark OpenClaude 2.1vsGrok 4.7Llama Nemotron Ultra 253BvsGrok 4.7Claude 2.1vsDeepSeek-V4.1-Flash-1017Llama Nemotron Ultra 253BvsDeepSeek-V4.1-Flash-1017Claude 2.1vsMistral Large 4Llama Nemotron Ultra 253BvsMistral Large 4Frequently asked questions
Claude 2.1 and Llama Nemotron Ultra 253B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2.1 shipped 504 days before Llama Nemotron Ultra 253B, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 2.1) vs 128k (Llama Nemotron Ultra 253B). Claude 2.1 is closed, while Llama Nemotron Ultra 253B is open weight.
Direct benchmark comparisons are unavailable — Claude 2.1 and Llama Nemotron Ultra 253B don't publish scores on any of the same benchmarks.