Claude 3 HaikuvsGrok 4.1 Fast
Claude 3 Haiku | 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. | 10% | 19%Best |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 33.3% | — |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Mar 4 2024 | Nov 19 2025 |
| Access | Proprietary | Proprietary |
Which is better: Claude 3 Haiku or Grok 4.1 Fast?
Grok 4.1 Fast leads Claude 3 Haiku on 1 of the 1 benchmark they both report (BullshitBench v2). Claude 3 Haiku shipped 625 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, Grok 4.1 Fast leads at 19% vs Claude 3 Haiku at 10%.
Frequently asked questions
Claude 3 Haiku was released by Anthropic on Mar 4 2024.
Grok 4.1 Fast was released by SpaceXAI on Nov 19 2025.
Other comparisons
Claude 3 HaikuvsGPT-5.6 SolGrok 4.1 FastvsGPT-5.6 SolClaude 3 HaikuvsGemini 3.6 FlashGrok 4.1 FastvsGemini 3.6 FlashClaude 3 HaikuvsMuse Spark 1.2Grok 4.1 FastvsMuse Spark 1.2Claude 3 HaikuvsDeepSeek-V4-Flash-0731Grok 4.1 FastvsDeepSeek-V4-Flash-0731Claude 3 HaikuvsMistral Medium 3.5Grok 4.1 FastvsMistral Medium 3.5Claude 3 HaikuvsKimi K3Grok 4.1 FastvsKimi K3