LLaMA 3.1 vs Grok 4 Fast
Meta LLaMA 3.1 | SpaceXAI Grok 4 Fast | |
|---|---|---|
| Overview | ||
| Company | Meta | SpaceXAI |
| Release date | Jul 23 2024 | Sep 2025 |
| Access | Open Weight | Proprietary |
| 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. | 14% | — |
| Timeline | ||
| Release gap | LLaMA 3.1 shipped 405 days before Grok 4 Fast | |
Which is better: LLaMA 3.1 or Grok 4 Fast?
LLaMA 3.1 and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. LLaMA 3.1 shipped 405 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.
LLaMA 3.1 is open weight, while Grok 4 Fast is proprietary.
Direct benchmark comparisons are unavailable — LLaMA 3.1 and Grok 4 Fast don't publish scores on any of the same benchmarks.
Frequently asked questions
LLaMA 3.1 was released by Meta on Jul 23 2024.
Grok 4 Fast was released by SpaceXAI on Sep 2025.
LLaMA 3.1 is an open weight model released by Meta. Grok 4 Fast is a proprietary model released by SpaceXAI.
Other comparisons
LLaMA 3.1 vs Claude Sonnet 5Grok 4 Fast vs Claude Sonnet 5LLaMA 3.1 vs GPT-5.6 SolGrok 4 Fast vs GPT-5.6 SolLLaMA 3.1 vs Gemini OmniGrok 4 Fast vs Gemini OmniLLaMA 3.1 vs DeepSeek-V4-ProGrok 4 Fast vs DeepSeek-V4-ProLLaMA 3.1 vs Mistral Medium 3.5Grok 4 Fast vs Mistral Medium 3.5LLaMA 3.1 vs Kimi K2.7 CodeGrok 4 Fast vs Kimi K2.7 Code