Grok 4.6
Key facts · verified Oct 30, 2026
Grok 4.6 is a SpaceXSI model released on 7 Aug 2026. Its API price is $2 per million input tokens and $6 per million output tokens (under 200k prompt; $4 / $12 at 200k and above). Its context window is 500k tokens. It ranks #72 on LMArena's text leaderboard (Elo 1455, read 2 Nov 2026). Source: docs.x.ai.
xAI's Grok 4.6, released on August 7, 2026, is built on the same 1.5-trillion-parameter V9 foundation as Grok 4.5, with gains xAI attributes to improved supervised fine-tuning and reinforcement learning rather than a new base model. It has a 500K-token context window with text and image input. xAI prices it at $2 per million input tokens and $6 per million output tokens for prompts under 200k tokens, doubling above that. xAI's docs now point to Grok 4.7 for code and chat.
Key Features
Full Specifications
$2 / $6 per million tokens | |
|---|---|
| Identity | |
| Developer | SpaceXSI |
| Released | Aug 2026 |
| Status | GA |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $3.000 / 1M tokens |
| Input price | $2.000 / 1M tokens |
| Output price | $6.000 / 1M tokens |
| Cached input | $0.50 / 1M tokens under 200k prompt; $1.00 at 200k and above |
| Batch discount | Not documented |
| Free tier | Not documented |
| Capacity | |
| Context window | 500k tokens |
| Max output | Not documented by xAI |
| Long-context surcharge | Yes — input and output both double at 200k tokens of prompt ($4 / $12) |
| Capability | |
| Vision in | Yes — jpg/jpeg or png, up to 20MiB per image |
| Audio in | No |
| Function calling | Yes |
| Structured output | Yes |
| Extended reasoning | Yes |
| Web search | Yes — live search available via the API |
| Code execution | Not documented |
| Access | |
| API | Yes |
| Chat app | Yes |
| Cloud marketplaces | Not documented |
| Fine-tuning | Not offered |
| Measured quality | |
| LMArena Elo | 1455 (checked Nov 2026) |
| LMArena rank | Rank 72 |
| GPQA Diamond | 94 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 485 |