NVIDIA vs 
SpaceXAI
Verdict
- SpaceXAI's flagship leads: Grok 4.6 at 66.0 vs Nemotron 3 Ultra 550B A55B at 57.5.
- SpaceXAI has the better model in 3 of 4 price bands.
- SpaceXAI's fastest ranked model (Grok 4.20 Multi-Agent, 304 tok/s) beats NVIDIA's (Nemotron 3.5 Lightning, 297 tok/s).
- NVIDIA publishes more open-weights models (24 vs 1).
- NVIDIA ships more often: one model every 34 days against every 42.
Best model per price band
Each provider’s highest-index model below the price ceiling. Purple marks the winner of the band.
| Price band | NVIDIA | SpaceXAI |
|---|---|---|
| Under $0.50/M | Nemotron 3 Super thinking 51.3$0.350/M | – |
| Under $2/M | Nemotron 3 Ultra 550B A55B thinking 57.5$1.00/M | Grok 4.20 thinking 59.9$1.56/M |
| Under $10/M | Nemotron 3 Ultra 550B A55B thinking 57.5$1.00/M | Grok 4.6 medium 66.0$3.00/M |
| Any price | Nemotron 3 Ultra 550B A55B thinking 57.5$1.00/M | Grok 4.6 medium 66.0$3.00/M |
Line-up
| Metric | NVIDIA | SpaceXAI |
|---|---|---|
| Flagship index | 57.5 | 66.0 |
| Ranked models | 16 | 16 |
| Open-weights models | 24 | 1 |
| Cheapest ranked, $/M | $0.095 | $1.25 |
| Fastest ranked, tok/s | 297 | 304 |
| Release cadence, days | 34 | 42 |
| Last release | 11 Aug 2026 | 21 Sept 2026 |
| Next expected | 31 Aug 2026 – 27 Sept 2026 | 16 Oct 2026 – 18 Nov 2026 |