Grok 4.3 vs Llama 3.1 Nemotron Ultra 253B v1
xAI vs NVIDIA — benchmarks, pricing, and capabilities side by side.
- •Grok 4.3 has the higher intelligence index (90.1 vs 78.3)
- •Llama 3.1 Nemotron Ultra 253B v1 is cheaper ($0.60 vs $1.25 per 1M input)
- •Grok 4.3 is faster
| Grok 4.3 | Llama 3.1 Nemotron Ultra 253B v1 | |
|---|---|---|
| Intelligence index | 90.1 | 78.3 |
| Developer | xAI | NVIDIA |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 1,000,000 tokens | — |
| Input price | $1.25 / 1M | $0.60 / 1M |
| Output price | $2.50 / 1M | $1.80 / 1M |
| Speed | 88 tok/s | 42 tok/s |
| Released | May 6, 2026 | April 7, 2025 |
| Parameters | — | 253000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
Grok 4.3
Llama 3.1 Nemotron Ultra 253B v1
GPQA Diamond
90.1
76
Humanity’s Last Exam
35
8.1