Gemini 2.5 FlashvsGrok 4.1 Fast
Gemini 2.5 Flash | Grok 4.1 Fast | |
|---|---|---|
| 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% | 19% |
| Overview | ||
| Company | SpaceXAI | |
| Release date | Apr 17 2025 | Nov 19 2025 |
| Access | Proprietary | Proprietary |
Which is better: Gemini 2.5 Flash or Grok 4.1 Fast?
Gemini 2.5 Flash and Grok 4.1 Fast are evenly matched across the 1 benchmark they both report (BullshitBench v2). Gemini 2.5 Flash shipped 216 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.
On BullshitBench v2, both models score 19%.
Frequently asked questions
Gemini 2.5 Flash was released by Google on Apr 17 2025.
Grok 4.1 Fast was released by SpaceXAI on Nov 19 2025.
Other comparisons
Gemini 2.5 FlashvsClaude Opus 5Grok 4.1 FastvsClaude Opus 5Gemini 2.5 FlashvsGPT-5.6 SolGrok 4.1 FastvsGPT-5.6 SolGemini 2.5 FlashvsMuse Spark 1.2Grok 4.1 FastvsMuse Spark 1.2Gemini 2.5 FlashvsDeepSeek-V4-Flash-0731Grok 4.1 FastvsDeepSeek-V4-Flash-0731Gemini 2.5 FlashvsMistral Medium 3.5Grok 4.1 FastvsMistral Medium 3.5Gemini 2.5 FlashvsKimi K3Grok 4.1 FastvsKimi K3