Grok 4.1 Fast (Reasoning)
Grok 4.1 Fast (Reasoning) by xAI — specifications, pricing and published benchmark scores, with community links.
| Organization | xAI |
|---|---|
| Released | 2025-11-19 |
| Open weights | No |
| Context window | 2,000,000 tokens |
| Modality | text, image |
| Input price | Self-host / varies |
| Output price | Self-host / varies |
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