Grok 2
SpaceXSI
Key facts · verified Oct 29, 2026
Grok 2 is a SpaceXSI model. Its API price is $2 per million input tokens and $10 per million output tokens (as listed by arena.ai; not on xAI's current pricing page). Its context window is 131.1K tokens. It ranks #242 on LMArena's text leaderboard (Elo 1336, read 1 Nov 2026). Source: docs.x.ai.
Grok 2 is a SpaceXSI model that does not appear on xAI's current API models page, which lists Grok 4.20 through Grok 4.7. LMArena listed it at $2 per million input tokens and $10 per million output tokens, with a 131.1K-token context window. On LMArena's text leaderboard: 1336 Elo (rank 242).
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1336 Elo (rank 242) · source · retrieved Nov 1, 2026
Full Specifications
$2 / $10 per million tokens | |
|---|---|
| Identity | |
| Developer | SpaceXSI |
| Status | Not listed on xAI's API models and pricing page as of 13 October 2026; the listed price is not a current xAI API price. |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $4.000 / 1M tokens |
| Input price | $2.000 / 1M tokens |
| Output price | $10.000 / 1M tokens |
| Capacity | |
| Context window | 131.1K tokens |
| Measured quality | |
| LMArena Elo | 1336 (checked Nov 2026) |
| LMArena rank | Rank 242 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 334 |