Compare AI models
These models have no shared benchmark scores. | ||
BullshitBench v2Nonsense detection — Given 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% | — |
| Overview | ||
| Company | SpaceXAI | SpaceXAI |
| Release date | Nov 19 2025 | Aug 14 2024 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Grok 4.1 FastvsClaude Sonnet 5.5Grok‑2vsClaude Sonnet 5.5Grok 4.1 FastvsGPT-6.1 SolGrok‑2vsGPT-6.1 SolGrok 4.1 FastvsGemini 4 ArgonGrok‑2vsGemini 4 ArgonGrok 4.1 FastvsMuse Spark 1.3Grok‑2vsMuse Spark 1.3Grok 4.1 FastvsDeepSeek-V4.1-FlashGrok‑2vsDeepSeek-V4.1-FlashGrok 4.1 FastvsMistral Large 4Grok‑2vsMistral Large 4Frequently asked questions
Grok 4.1 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 462 days before Grok 4.1 Fast, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Grok 4.1 Fast and Grok‑2 don't publish scores on any of the same benchmarks.