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Grok 4.6 vs Nemotron 3 Ultra
Grok 4.6 (xAI) and Nemotron 3 Ultra (NVIDIA) compared on benchmarks, pricing, context window, and use-case rankings.
- Grok 4.6 leads on overall intelligence (ECI 156 vs 146).
| Attribute | Grok 4.6 | Nemotron 3 Ultra |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 156 | 146 |
| Coding | 92 | — |
| Math | 91 | 33 |
| Reasoning & Knowledge | 73 | 31 |
| Agentic & Tools | 84 | 16 |
| Specifications | ||
| Developer | xAI | NVIDIA |
| Family | Grok | Nemotron |
| Released | Aug 12, 2026 | Jun 4, 2026 |
| Parameters | — | 550B |
| Availability | API access | Open weights (unrestricted) |
| Context window | 500K | — |
| Price — $/M input | $2.00 | — |
| Price — $/M output | $6.00 | — |
| Inputs | text, image, file | — |
| Outputs | text | — |
| Benchmarks | ||
| AIME 2024/2025 | 99% | 87% |
| APEX | 41% | 12% |
| ARC-AGI | 88% | — |
| ARC-AGI-2 | 67% | — |
| GPQA Diamond | 94% | 85% |
| Humanity's Last Exam | 43% | — |
| SciCode | 56% | — |
| SimpleBench | 76% | — |
| SimpleQA Verified | 49% | — |
| WebDev Arena | 1629 | — |
| WeirdML | 67% | 43% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Grok 4.6 better than Nemotron 3 Ultra?
On Epoch AI's Capabilities Index, Grok 4.6 scores higher (156) than Nemotron 3 Ultra (146). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.