Grok 4.1 Fast vs Grok‑1
SpaceXAI Grok 4.1 Fast | SpaceXAI Grok‑1 | |
|---|---|---|
| Overview | ||
| Company | SpaceXAI | SpaceXAI |
| Release date | Nov 19 2025 | Nov 3 2023 |
| Access | Proprietary | Open Weight |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 19% | — |
| Timeline | ||
| Release gap | Grok‑1 shipped 747 days before Grok 4.1 Fast | |
Which is better: Grok 4.1 Fast or Grok‑1?
Grok 4.1 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 747 days before Grok 4.1 Fast, so benchmark comparisons should account for the intervening progress.
Grok 4.1 Fast is proprietary, while Grok‑1 is open weight.
Direct benchmark comparisons are unavailable — Grok 4.1 Fast and Grok‑1 don't publish scores on any of the same benchmarks.
Frequently asked questions
Grok 4.1 Fast was released by SpaceXAI on Nov 19 2025.
Grok‑1 was released by SpaceXAI on Nov 3 2023.
Grok 4.1 Fast is a proprietary model released by SpaceXAI. Grok‑1 is an open weight model released by SpaceXAI.
Other comparisons
Grok 4.1 Fast vs Claude Sonnet 5Grok‑1 vs Claude Sonnet 5Grok 4.1 Fast vs GPT-5.6 SolGrok‑1 vs GPT-5.6 SolGrok 4.1 Fast vs Gemini OmniGrok‑1 vs Gemini OmniGrok 4.1 Fast vs Muse Spark 1.1Grok‑1 vs Muse Spark 1.1Grok 4.1 Fast vs DeepSeek-V4-ProGrok‑1 vs DeepSeek-V4-ProGrok 4.1 Fast vs Mistral Medium 3.5Grok‑1 vs Mistral Medium 3.5