Grok 4 Heavy vs Nemotron 3 Ultra
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
Grok 4 Heavy
B
Nemotron 3 Ultra
- ProviderxAINVIDIA
- Rank#57#54Higher rank
- TierAA
- Score74.976.1Higher score
- PriceSuperGrok Heavy subscription ($300/mo); not listed in the xAI API model catalogOpen weights; low-cost hosted routes incl. a free tierLower price tier
- TaglinexAI's July 2025 Grok 4 variant that runs parallel test-time compute, offered through the SuperGrok Heavy plan; since followed by Grok 4.20, 4.5, 4.6 and 4.7.NVIDIA's flagship open-weight model, positioned around deployment efficiency.
| Attribute | Grok 4 Heavy | Nemotron 3 Ultra |
|---|---|---|
| Provider | xAI | NVIDIA |
| Rank | #57 | #54Higher rank |
| Tier | A | A |
| Score | 74.9 | 76.1Higher score |
| Price | SuperGrok Heavy subscription ($300/mo); not listed in the xAI API model catalog | Open weights; low-cost hosted routes incl. a free tierLower price tier |
| Tagline | xAI's July 2025 Grok 4 variant that runs parallel test-time compute, offered through the SuperGrok Heavy plan; since followed by Grok 4.20, 4.5, 4.6 and 4.7. | NVIDIA's flagship open-weight model, positioned around deployment efficiency. |