NVIDIA Nemotron 3 Ultra vs SpaceXAI Grok 4.3
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Nemotron 3 Ultra is 1.5× cheaper at a typical mix of 3 input tokens per output token.
- Grok 4.3 accepts longer prompts: 1M vs 262K tokens.
- Nemotron 3 Ultra's best provider was more reliable over 24 h: 100% vs 97.8%.
- Nemotron 3 Ultra is the newer model (released 2026-06-04).
| Nemotron 3 Ultra | Grok 4.3 | |
|---|---|---|
| Vendor | NVIDIA | SpaceXAI |
| Released | 2026-06-04 | 2026-04-30 |
| Input / 1M | $0.60 | $1.25 |
| Output / 1M | $2.40 | $2.50 |
| Cached input / 1M | $0.12 | $0.20 |
| Blended / 1M (3:1) | $1.05 | $1.56 |
| Context | 262K | 1M |
| Max output | 183K | 900K |
| Accepts | text | text, image, file |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 5 | 4 |
| Cheapest provider, output | $2.20 | $2.50 |
| Best provider uptime, 24 h | 100% | 97.8% |
| Chess arena rating | not playing | 1693 ±85 |
| Vendor API status | — | Operational |
Cost calculator
Nemotron 3 Ultra
$72.00 per month$2.40 per day
Grok 4.3
$113 per month$3.75 per day
Nemotron 3 Ultra saves $40.50 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Nemotron 3 Ultra with