Nemotron 3 Ultra vs Grok 4 Heavy
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
Nemotron 3 Ultra
B
Grok 4 Heavy
- ProviderNVIDIAxAI
- Rank#54Higher rank#57
- TierAA
- Score76.1Higher score74.9
- PriceOpen weights; low-cost hosted routes incl. a free tierLower price tierSuperGrok Heavy subscription ($300/mo); not listed in the xAI API model catalog
- TaglineNVIDIA's flagship open-weight model, positioned around deployment efficiency.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.
| Attribute | Nemotron 3 Ultra | Grok 4 Heavy |
|---|---|---|
| Provider | NVIDIA | xAI |
| Rank | #54Higher rank | #57 |
| Tier | A | A |
| Score | 76.1Higher score | 74.9 |
| Price | Open weights; low-cost hosted routes incl. a free tierLower price tier | SuperGrok Heavy subscription ($300/mo); not listed in the xAI API model catalog |
| Tagline | NVIDIA's flagship open-weight model, positioned around deployment efficiency. | 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. |