Compare AI models
| Overview | ||
| Company | SpaceXAI | SpaceXAI |
| Release date | Sep 19 2025 | Nov 3 2023 |
| Access | Closed | Open Weight |
| Model details | View model | View model |
Other comparisons
Grok 4 FastvsClaude Sonnet 5.5Grok‑1vsClaude Sonnet 5.5Grok 4 FastvsGPT-6.1 SolGrok‑1vsGPT-6.1 SolGrok 4 FastvsGemini 4 ArgonGrok‑1vsGemini 4 ArgonGrok 4 FastvsMuse Spark 1.3Grok‑1vsMuse Spark 1.3Grok 4 FastvsDeepSeek-V4.1-FlashGrok‑1vsDeepSeek-V4.1-FlashGrok 4 FastvsMistral Large 4Grok‑1vsMistral Large 4Frequently asked questions
Grok 4 Fast and Grok‑1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1 shipped 686 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
Grok 4 Fast is closed, while Grok‑1 is open weight.
Direct benchmark comparisons are unavailable — Grok 4 Fast and Grok‑1 don't publish scores on any of the same benchmarks.