GPT-4o vs Grok 4.1 Fast
Head to head on 16 shared benchmarks, with price, context window, and release dates.
Benchmark scores
49evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grok 4.1 Fast xAI | 89.3% | 66.0% | 85.3% | 19.3% | 52.7% | 64.7% | 69.6% | 28.2% | 74.3% | 82.2% | 85.4% | 42.6% | 44.2% | 73.1% | 24.2% | 93.3% | 62.0% | - | - | - | - | - | - | 1327elo | 40.1 | - | - | 11.8 | 35.0% | 80.2% | - | 52.2% | 83.7% | 80.2% | - | 60.8% | 28.1% | 100.0% | - | 78.7% | - | 4.0% | 31.3% | - | - | - | - | 1.2% | - | 58.3% |
| GPT-4o OpenAI | 6.0% | 45.9% | 54.3% | 2.4% | 34.3% | 55.1% | 46.1% | 70.1% | 49.0% | 30.9% | 74.8% | 57.4% | 33.3% | 74.5% | 8.3% | 25.1% | - | 18.2% | 15.0% | 38 | 0.0% | 0.33 | 6.1% | - | - | 0.3% | 96.1 | - | - | - | 0.0% | - | - | - | 75.9% | - | - | - | 10.8% | - | 54.0% | - | - | 5.71 | 21.6% | 61.2 | 0.98 | - | 32.5% | 33.4% |
2 / 2 models
| Attribute | GPT-4o OpenAI | Grok 4.1 Fast xAI |
|---|---|---|
| Description | GPT-4o 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 | 20 Nov 2024 | 19 Nov 2025 |
| Context | 128,000 | - |
| Input $/1M | $2.50 | - |
| Output $/1M | $10.00 | - |
| Cache read $/1M | $1.250 | - |
| 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 | Taubench61.2 pass^1 GSM8K96.1 Accuracy ScholarSearch5.71 Social Sciences & Humanities (%) MortgageTax57.4% AIME202438 pass@1 | Infraresolutionbench80.2% (150 samples) Agent Diff Bench62.0% (179 samples) Medpt100.0% (15 samples) Hanabi11.8 (15 samples) SciCode44.2% (AA) |
FAQ
- Is GPT-4o or Grok 4.1 Fast better?
- Across the 16 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 GPT-4o and Grok 4.1 Fast compare on GPQA Diamond?
- GPT-4o scores 54.3% and Grok 4.1 Fast scores 85.3% on GPQA Diamond.
- When were GPT-4o and Grok 4.1 Fast released?
- GPT-4o was released 20 Nov 2024 by OpenAI. 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 Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 shared evalsGPT-5 Mini vs Grok 4.1 Fast26 shared evalsDeepSeek V3.2 vs Grok 4.1 Fast26 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 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 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 GPT-4o22 shared evalsGemini 2.5 Pro vs Grok 4.1 Fast22 shared evalsGPT-5.4 Mini vs Grok 4.1 Fast22 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsGPT-4o vs GPT-4o-mini21 shared evalsGrok 4.1 Fast vs Qwen3.6 Plus21 shared evalsGPT-4.1 Mini vs GPT-4o20 shared evalsGPT-4o vs GPT-5 Mini20 shared evalsGPT-5 vs Grok 4.1 Fast20 shared evalsClaude 4 Sonnet vs GPT-4o20 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGPT-4o vs GPT-519 shared evalsGPT-4.1 vs GPT-4o19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsGPT-4o vs GPT-5.218 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsDeepSeek V3.2 vs GPT-4o18 shared evalsGPT-4o vs gpt-oss-120b17 shared evalsGPT-4.1 Nano vs GPT-4o16 shared evalsGLM 4.7 vs GPT-4o16 shared evalsGPT-4o vs GPT-5.515 shared evalsClaude Opus 4.6 vs GPT-4o15 shared evalsGPT-4o vs Kimi K2.515 shared evalsGPT-4o-mini vs Grok 4.1 Fast15 shared evalsGPT-4.1 Mini vs Grok 4.1 Fast14 shared evalsGemini 3.1 Pro Preview vs GPT-4o14 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsGPT-4o vs GPT-5.414 shared evalsClaude Sonnet 4.6 vs GPT-4o14 shared evalsGLM 5.1 vs GPT-4o14 shared evalsClaude Opus 4.7 vs GPT-4o14 shared evalsGPT-4.1 Nano vs Grok 4.1 Fast14 shared evalsGPT-4o vs Qwen3.6 Plus14 shared evalsGPT-4o vs GPT-5.4 Mini14 shared evalsClaude Fable 5 vs GPT-4o13 shared evalsGPT-4.1 vs Grok 4.1 Fast13 shared evalsGPT-6 Astra vs Grok 4.1 Fast10 shared evalsGPT-4o vs GPT-6 Astra4 shared evals
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