Compare AI models
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | — | 253B |
| Benchmarks | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 50.4% | 76% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 33% | — |
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% |
| Overview | ||
| Company | Anthropic | NVIDIA |
| Release date | Mar 4 2024 | Apr 8 2025 |
| Access | Closed | Open Weight |
| Model details | View model | View model |
Other comparisons
Claude 3 OpusvsGPT-6.1 SolLlama Nemotron Ultra 253BvsGPT-6.1 SolClaude 3 OpusvsGemini 4 ArgonLlama Nemotron Ultra 253BvsGemini 4 ArgonClaude 3 OpusvsMuse Spark 1.3Llama Nemotron Ultra 253BvsMuse Spark 1.3Claude 3 OpusvsGrok 4.7Llama Nemotron Ultra 253BvsGrok 4.7Claude 3 OpusvsDeepSeek-V4.1-FlashLlama Nemotron Ultra 253BvsDeepSeek-V4.1-FlashClaude 3 OpusvsMistral Large 4Llama Nemotron Ultra 253BvsMistral Large 4Frequently asked questions
Llama Nemotron Ultra 253B leads Claude 3 Opus on 1 of the 1 benchmark they both report (GPQA Diamond). Claude 3 Opus shipped 400 days before Llama Nemotron Ultra 253B, so benchmark comparisons should account for the intervening progress.
Claude 3 Opus is closed, while Llama Nemotron Ultra 253B is open weight.
On GPQA Diamond, Llama Nemotron Ultra 253B leads at 76% vs Claude 3 Opus at 50.4%.