GPT-5 Nano vs Grok 4.1 Fast
Head to head on 24 shared benchmarks, with price, context window, and release dates.
Benchmark scores
57evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grok 4.1 Fast xAI | 89.3% | 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% | 4.0% | 31.3% | 44.2% | 73.1% | 24.2% | 93.3% | 62.0% | - | - | - | - | 66.0% | - | - | - | - | - | 11.8 | 35.0% | 80.2% | - | - | - | - | 60.8% | - | 100.0% | - | - | - | - | - | - | - | - | 1.2% | - | - | - | 58.3% |
| GPT-5 Nano OpenAI | 83.7% | 705elo | 28 | 67.6% | 9.5% | 67.6% | 52.8% | 62.4% | 43.4% | 55.7% | 46.8% | 68.4% | 40.3% | 78.9% | 30.4% | 72.9% | 78.0% | 53.6% | 12.0% | 30.4% | 36.6% | 67.4% | 12.1% | 36.5% | - | 0.0% | 0.25 | 0.21 | 6.7% | - | 10.0% | 78.2% | 8.3% | 1.18 | 100.0% | - | - | - | 1.38 | 1.38 | 100.0% | 100.0% | - | 26.7% | - | 100.0% | 0.0% | 0.0% | 1.72 | 34.8% | 29.7% | 20.41 | -6.67 | - | 82.0% | 82.0% | 40.0% | 48.9% |
2 / 2 models
| Attribute | GPT-5 Nano OpenAI | Grok 4.1 Fast xAI |
|---|---|---|
| Description | GPT-5 nano is an AI model from OpenAI. | Grok 4.1 Fast is an AI model from xAI. |
| Family | GPT | Grok |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 7 Aug 2025 | 19 Nov 2025 |
| Context | 400,000 | - |
| Input $/1M | $0.05 | - |
| Output $/1M | $0.40 | - |
| Cache read $/1M | $0.005 | - |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text |
| Providers | - | - |
| Publisher | OpenAI | 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 GPT-5 Nano or Grok 4.1 Fast better?
- Across the 24 benchmarks both models report on Sophon, Grok 4.1 Fast leads on 19 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5 Nano and Grok 4.1 Fast compare on GPQA Diamond?
- GPT-5 Nano scores 67.6% and Grok 4.1 Fast scores 85.3% on GPQA Diamond.
- When were GPT-5 Nano and Grok 4.1 Fast released?
- GPT-5 Nano was released 7 Aug 2025 by OpenAI. Grok 4.1 Fast was released 19 Nov 2025 by xAI.
Other head-to-heads
56GPT-5 Mini vs GPT-5 Nano38 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsGPT-5.2 vs Grok 4.1 Fast30 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsGPT-4.1 Mini vs GPT-5 Nano26 shared evalsGPT-5 Mini vs Grok 4.1 Fast26 shared evalsGPT-5 Nano vs GPT-5.226 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsDeepSeek V3.2 vs Grok 4.1 Fast26 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 Opus 4.6 vs Grok 4.1 Fast25 shared evalsGPT-5.4 vs Grok 4.1 Fast25 shared evalsGemini 2.5 Pro vs GPT-5 Nano24 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsClaude 4 Sonnet 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 evalsGPT-5 Nano vs GPT-5.523 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsGLM 4.7 vs GPT-5 Nano23 shared evalsClaude Fable 5 vs Grok 4.1 Fast23 shared evalsGLM 5.1 vs Grok 4.1 Fast23 shared evalsGemini 3.1 Pro Preview vs GPT-5 Nano22 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs GPT-5.422 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Opus 4.7 vs GPT-5 Nano22 shared evalsDeepSeek V3.2 vs GPT-5 Nano22 shared evalsGPT-4.1 Nano vs GPT-5 Nano22 shared evalsGPT-5 Nano vs gpt-oss-120b22 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 Fable 5 vs GPT-5 Nano21 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsGrok 4.1 Fast vs Qwen3.6 Plus21 shared evalsGPT-5 vs Grok 4.1 Fast20 shared evalsGPT-4.1 vs GPT-5 Nano20 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsGPT-5.4 Mini vs GPT-5 Nano20 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGPT-5 Nano vs Qwen3.6 Plus19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsGPT-4o-mini vs GPT-5 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-5 Nano vs GPT-6 Astra10 shared evalsGPT-6 Astra vs Grok 4.1 Fast10 shared evals
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