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. | 32k | 2M |
| Overview | ||
| Company | SpaceXSI | |
| Release date | Feb 8 2024 | Sep 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Gemini 1.0 UltravsClaude Haiku 5.5Grok 4 FastvsClaude Haiku 5.5Gemini 1.0 UltravsGPT-6.1 SolGrok 4 FastvsGPT-6.1 SolGemini 1.0 UltravsMuse Spark OpenGrok 4 FastvsMuse Spark OpenGemini 1.0 UltravsDeepSeek-V4.1-Flash-1017Grok 4 FastvsDeepSeek-V4.1-Flash-1017Gemini 1.0 UltravsMistral Large 4Grok 4 FastvsMistral Large 4Gemini 1.0 UltravsKimi K3Grok 4 FastvsKimi K3Frequently asked questions
Gemini 1.0 Ultra and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.0 Ultra shipped 589 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
Context windows are 32k (Gemini 1.0 Ultra) vs 2M (Grok 4 Fast).
Direct benchmark comparisons are unavailable — Gemini 1.0 Ultra and Grok 4 Fast don't publish scores on any of the same benchmarks.