Anthropic vs 
SpaceXAI
Verdict
- Anthropic's flagship leads: Claude Opus 5.5 at 69.3 vs Grok 4.6 at 60.5.
- Anthropic has the better model in 3 of 4 price bands.
- SpaceXAI's fastest ranked model (Grok 4.20 Multi-Agent, 347 tok/s) beats Anthropic's (Claude Haiku 5.5, 234 tok/s).
- SpaceXAI publishes more open-weights models (1 vs 0).
- Anthropic ships more often: one model every 24 days against every 41.
Best model per price band
Each provider’s highest-index model below the price ceiling. Purple marks the winner of the band.
| Price band | Anthropic | SpaceXAI |
|---|---|---|
| Under $0.50/M | Claude Haiku 5.5 xhigh 57.3$0.200/M | Grok 4.1 Fast thinking 55.6$0.275/M |
| Under $2/M | Claude Haiku 5.5 xhigh 57.3$0.200/M | Grok 4.20 thinking 58.4$1.56/M |
| Under $10/M | Claude Opus 5.5 max 69.3$8.00/M | Grok 4.6 high 60.5$3.00/M |
| Any price | Claude Opus 5.5 max 69.3$8.00/M | Grok 4.6 high 60.5$3.00/M |
Line-up
| Metric | Anthropic | SpaceXAI |
|---|---|---|
| Flagship index | 69.3 | 60.5 |
| Ranked models | 23 | 15 |
| Open-weights models | 0 | 1 |
| Cheapest ranked, $/M | $0.200 | $0.275 |
| Fastest ranked, tok/s | 234 | 347 |
| Release cadence, days | 24 | 41 |
| Last release | 7 Oct 2026 | 21 Sep 2026 |
| Next expected | 21 Oct 2026 – 9 Nov 2026 | 15 Oct 2026 – 17 Nov 2026 |