Compare AI models
| Specifications | ||
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 2M | 128k |
| Overview | ||
| Company | SpaceXSI | SpaceXSI |
| Release date | Sep 19 2025 | Aug 14 2024 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Grok 4 FastvsClaude Haiku 5.5Grok‑2vsClaude Haiku 5.5Grok 4 FastvsGPT-6.1 SolGrok‑2vsGPT-6.1 SolGrok 4 FastvsGemini 4 ArgonGrok‑2vsGemini 4 ArgonGrok 4 FastvsMuse Spark OpenGrok‑2vsMuse Spark OpenGrok 4 FastvsDeepSeek-V4.1-Flash-1017Grok‑2vsDeepSeek-V4.1-Flash-1017Grok 4 FastvsMistral Large 4Grok‑2vsMistral Large 4Frequently asked questions
Grok 4 Fast and Grok‑2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑2 shipped 401 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
Context windows are 2M (Grok 4 Fast) vs 128k (Grok‑2).
Direct benchmark comparisons are unavailable — Grok 4 Fast and Grok‑2 don't publish scores on any of the same benchmarks.