GPT-5 Pro vs Grok 4
Direct spec comparison of GPT-5 Pro (from OpenAI) and Grok 4 (from xAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 GPT-5 ProOpenAI |  Grok 4xAI | |
|---|---|---|
| Vendor | OpenAI | xAI |
| Family | GPT | Grok |
| Release date | 2025-08-07 | 2025-07-09 |
| Context window | 400,000 tokens | 256,000 tokens |
| Parameters | — | — |
| Modality | text, vision, audio | text |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth. | — |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | — | 82.8% |
| GPQA-D | — | 87.5% |
| Aider | — | 72.5% |
| AIME-25 | — | 86.1% |
| LiveCB | — | 65.3% |
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