GPT-5.4 vs Grok 4.1 Fast
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
46evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.4 OpenAI | 65.3% | 1836elo | 78.3 | 74.8% | 11.3% | 48.4% | 78.5% | 82.0% | 77.5% | 79.3% | 70.2% | 82.6% | 94.1% | 88.1% | 82.8% | 41.3% | 77.5% | 68.3% | 56.0% | 43.3% | 47.1% | 74.0% | 37.9% | 67.4% | 36.0% | - | - | 13.1% | 1.47 | 81.0% | 34.1% | 9.0% | 1272elo | 47.6% | 87.2% | - | - | 92063 | - | - | - | 86 | 52.2% | -0.61 | 40.8 | 80 | 60.3% |
| Grok 4.1 Fast xAI | 66.0% | 1324elo | 40.1 | 63.7% | 5.1% | 36.5% | 80.2% | 64.7% | 69.6% | 52.2% | 28.2% | 74.3% | 83.7% | 80.2% | 60.8% | 28.1% | 78.7% | 42.6% | 4.0% | 31.3% | 29.6% | 73.1% | 14.4% | 1.2% | 63.7% | 62.0% | 34.3% | - | - | - | - | - | - | - | - | 11.8 | 35.0% | - | 39.9% | 100.0% | 74.3% | - | - | - | - | - | 51.0% |
2 / 2 models
| Attribute | GPT-5.4 OpenAI | Grok 4.1 Fast xAI |
|---|---|---|
| Description | GPT-5.4 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 | 5 Mar 2026 | 19 Nov 2025 |
| Context | 1,050,000 | - |
| Input $/1M | $2.50 | - |
| Output $/1M | $15.00 | - |
| Cache read $/1M | $0.250 | - |
| 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 | GPQA Diamond74.8% (AA) SciCode47.1% (AA) τ²-bench (Tau²-bench)36.0% (AA) Terminal-Bench (Hard)37.9% (AA) Vibe Code Bench v1.167.4% | Infraresolutionbench80.2% (150 samples) Agent Diff Bench62.0% (179 samples) Medpt100.0% (15 samples) Hanabi11.8 (15 samples) SciCode29.6% (AA) |
FAQ
- Is GPT-5.4 or Grok 4.1 Fast better?
- Across the 25 benchmarks both models report on Sophon, GPT-5.4 leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5.4 and Grok 4.1 Fast compare on GPQA Diamond?
- GPT-5.4 scores 74.8% and Grok 4.1 Fast scores 63.7% on GPQA Diamond.
- When were GPT-5.4 and Grok 4.1 Fast released?
- GPT-5.4 was released 5 Mar 2026 by OpenAI. Grok 4.1 Fast was released 19 Nov 2025 by xAI.
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