Claude 4 Sonnet vs Grok 4.1 Fast
Head to head on 24 shared benchmarks, with price, context window, and release dates.
Benchmark scores
48evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude 4 Sonnet Anthropic | 74.3% | 54.7% | 1483elo | 58.4 | 77.7% | 10.7% | 54.7% | 64.8% | 77.5% | 54.6% | 44.3% | 72.9% | 70.5% | 69.0% | 65.5% | 33.9% | 72.4% | 84.2% | 62.5% | 35.0% | 40.0% | 69.6% | 31.1% | 64.6% | - | 77.3% | 22.9% | 47.8% | 19.8% | 67.5% | - | - | - | 99.1% | - | - | 86.7% | 43.9% | - | 6.18 | 6.18 | 58.3% | 35.6% | 74.6% | 0.59 | - | 84.0% | 84.0% | 59.6% |
| Grok 4.1 Fast xAI | 89.3% | 66.0% | 1327elo | 40.1 | 85.3% | 19.3% | 52.7% | 64.7% | 69.6% | 52.2% | 28.2% | 74.3% | 83.7% | 80.2% | 82.2% | 28.1% | 78.7% | 85.4% | 42.6% | 31.3% | 44.2% | 73.1% | 24.2% | 93.3% | 62.0% | - | - | - | - | - | 11.8 | 35.0% | 80.2% | - | 60.8% | 100.0% | - | - | 4.0% | - | - | - | - | - | - | 1.2% | - | - | 58.3% |
2 / 2 models
| Attribute | Claude 4 Sonnet Anthropic | Grok 4.1 Fast xAI |
|---|---|---|
| Description | Claude 4 Sonnet is an AI model from Anthropic. | Grok 4.1 Fast is an AI model from xAI. |
| Family | Claude | Grok |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 22 May 2025 | 19 Nov 2025 |
| Context | 200,000 | - |
| Input $/1M | - | - |
| Output $/1M | - | - |
| Cache read $/1M | - | - |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text |
| Providers | - | - |
| Publisher | Anthropic | xAI |
| Reported scores | Infraresolutionbench80.2% (150 samples) Agent Diff Bench62.0% (179 samples) Medpt100.0% (15 samples) Hanabi11.8 (15 samples) SciCode44.2% (AA) |
FAQ
- Is Claude 4 Sonnet or Grok 4.1 Fast better?
- Across the 24 benchmarks both models report on Sophon, Grok 4.1 Fast leads on 13 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 4 Sonnet and Grok 4.1 Fast compare on GPQA Diamond?
- Claude 4 Sonnet scores 77.7% and Grok 4.1 Fast scores 85.3% on GPQA Diamond.
- When were Claude 4 Sonnet and Grok 4.1 Fast released?
- Claude 4 Sonnet was released 22 May 2025 by Anthropic. Grok 4.1 Fast was released 19 Nov 2025 by xAI.
Other head-to-heads
56GPT-5.2 vs Grok 4.1 Fast30 shared evalsClaude 4 Sonnet vs GPT-5 Mini29 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.528 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 shared evalsGPT-5 Mini vs Grok 4.1 Fast26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsDeepSeek V3.2 vs Grok 4.1 Fast26 shared evalsClaude 4 Sonnet vs GPT-525 shared evalsGPT-5.5 vs Grok 4.1 Fast25 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsGemini 3.1 Pro Preview vs Grok 4.1 Fast25 shared evalsClaude 4 Sonnet vs GPT-5.225 shared evalsClaude 4 Sonnet vs Gemini 2.5 Pro25 shared evalsClaude Opus 4.6 vs Grok 4.1 Fast25 shared evalsGPT-5.4 vs Grok 4.1 Fast25 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsGrok 4.1 Fast vs Kimi K2.524 shared evalsClaude Opus 4.7 vs Grok 4.1 Fast24 shared evalsGLM 4.7 vs Grok 4.1 Fast24 shared evalsClaude 4 Sonnet vs GPT-5.523 shared evalsClaude 4 Sonnet vs Gemini 3.1 Pro Preview23 shared evalsClaude Fable 5 vs Grok 4.1 Fast23 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsGLM 5.1 vs Grok 4.1 Fast23 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude 4 Sonnet vs Claude Fable 522 shared evalsClaude 4 Sonnet vs Claude Opus 4.622 shared evalsClaude 4 Sonnet vs GPT-5.422 shared evalsClaude 4 Sonnet vs GLM 4.722 shared evalsClaude Sonnet 4.6 vs Grok 4.1 Fast22 shared evalsGemini 2.5 Pro vs Grok 4.1 Fast22 shared evalsGPT-5.4 Mini vs Grok 4.1 Fast22 shared evalsClaude 4 Sonnet vs Claude Opus 4.721 shared evalsClaude 4 Sonnet vs DeepSeek V3.221 shared evalsClaude 4 Sonnet vs gpt-oss-120b21 shared evalsGrok 4.1 Fast vs Qwen3.6 Plus21 shared evalsGPT-5 vs Grok 4.1 Fast20 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.620 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsClaude 4 Sonnet vs GPT-4o20 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsClaude 4 Sonnet vs GPT-4.1 Mini19 shared evalsClaude 4 Sonnet vs GPT-4.119 shared evalsClaude 4 Sonnet vs Qwen3.6 Plus19 shared evalsClaude 4 Sonnet vs GPT-5.4 Mini19 shared evalsClaude 4 Sonnet vs GPT-4o-mini18 shared evalsClaude 4 Sonnet vs GPT-4.1 Nano16 shared evalsGPT-4o vs Grok 4.1 Fast16 shared evalsGPT-4o-mini vs Grok 4.1 Fast15 shared evalsGPT-4.1 Mini vs Grok 4.1 Fast14 shared evalsGPT-4.1 Nano vs Grok 4.1 Fast14 shared evalsGPT-4.1 vs Grok 4.1 Fast13 shared evalsGPT-6 Astra vs Grok 4.1 Fast10 shared evalsClaude 4 Sonnet vs GPT-6 Astra8 shared evals
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