GPT-5 vs Grok 4.1 Fast
Head to head on 20 shared benchmarks, with price, context window, and release dates.
Benchmark scores
74evals · sort by any column, ⤢ to expand fullscreen
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| GPT-5 OpenAI | 94.3% | 61.1% | 1627elo | 72.8 | 85.4% | 28.5% | 73.1% | 83.4% | 84.6% | 49.6% | 83.7% | 87.1% | 65.5% | 18.0% | 43.7% | 42.9% | 73.4% | 32.6% | 20.1% | 84.8% | 46.7% | - | 91.1% | 88.0% | 94.6% | 0.0% | 0.15 | 0.0% | 68.1% | 4.58 | 57.7% | 80.0% | 80.0% | 91.7% | 32.4% | 0.0% | 88.9% | 83.3% | 100.0% | - | 48.9% | - | 58.2% | - | - | - | - | - | - | - | 37.5% | 0.52 | 1.62 | 100.0% | 99.4% | - | 0.0% | 92.7% | 92.7% | - | 93.3% | 10.0% | 0.0% | 60.0% | 0.26 | 0.0% | 74.9% | 74.4% | 2.34 | 87.5% | 0.86 | 54.8% | 90.0% | 90.0% | 61.9% |
| Grok 4.1 Fast xAI | 89.3% | 66.0% | 1327elo | 40.1 | 85.3% | 19.3% | 52.7% | 80.2% | 82.2% | 28.1% | 78.7% | 85.4% | 42.6% | 4.0% | 31.3% | 44.2% | 73.1% | 24.2% | 1.2% | 93.3% | - | 62.0% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 11.8 | - | 35.0% | - | 64.7% | 69.6% | 52.2% | 28.2% | 74.3% | 83.7% | 80.2% | - | - | - | - | - | 60.8% | - | - | - | 100.0% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 58.3% |
2 / 2 models
| Attribute | GPT-5 OpenAI | Grok 4.1 Fast xAI |
|---|---|---|
| Description | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. | Grok 4.1 Fast is an AI model from xAI. |
| Family | GPT 5 | Grok |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 7 Aug 2025 | 19 Nov 2025 |
| Context | 400,000 | - |
| Input $/1M | $1.25 | - |
| Output $/1M | $10.00 | - |
| Cache read $/1M | $0.125 | - |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text |
| Providers | openai | - |
| Publisher | OpenAI | xAI |
| Reported scores | SWE-bench74.9% (Verified) GPQA Diamond85.4% (AA) Humanity's Last Exam (HLE)28.5% (AA) IFBench73.1% (AA) | 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 or Grok 4.1 Fast better?
- Across the 20 benchmarks both models report on Sophon, GPT-5 leads on 17 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5 and Grok 4.1 Fast compare on GPQA Diamond?
- GPT-5 scores 85.4% and Grok 4.1 Fast scores 85.3% on GPQA Diamond.
- When were GPT-5 and Grok 4.1 Fast released?
- GPT-5 was released 7 Aug 2025 by OpenAI. Grok 4.1 Fast was released 19 Nov 2025 by xAI.
Other head-to-heads
56GPT-4.1 Mini vs GPT-541 shared evalsGPT-5 vs GPT-5 Mini36 shared evalsClaude Sonnet 4.5 vs GPT-531 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 vs GPT-528 shared evalsGPT-5 Mini vs Grok 4.1 Fast26 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 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-524 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 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 vs GPT-5.223 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Grok 4.1 Fast23 shared evalsGLM 5.1 vs Grok 4.1 Fast23 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 evalsGPT-4.1 Nano vs GPT-521 shared evalsGrok 4.1 Fast vs Qwen3.6 Plus21 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGemini 3.1 Pro Preview vs GPT-519 shared evalsClaude Opus 4.6 vs GPT-519 shared evalsGPT-5 vs GPT-5.419 shared evalsDeepSeek V3.2 vs GPT-519 shared evalsGPT-4o vs GPT-519 shared evalsGPT-5 vs GPT-5.518 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude Opus 4.7 vs GPT-517 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGLM 4.7 vs GPT-517 shared evalsClaude Fable 5 vs GPT-516 shared evalsGPT-4o-mini vs GPT-516 shared evalsClaude Sonnet 4.6 vs GPT-516 shared evalsGLM 5.1 vs GPT-516 shared evalsGPT-5 vs GPT-5.4 Mini16 shared evalsGPT-4o vs Grok 4.1 Fast16 shared evalsGPT-5 vs Qwen3.6 Plus15 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 vs GPT-6 Astra12 shared evalsGPT-6 Astra vs Grok 4.1 Fast10 shared evals
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