Grok 4 Fast (Reasoning): benchmark results
Grok 4 Fast evaluated with reasoning enabled. Provider: xAI. Released 2025-09-19. Access: API.
Aggregate Rating 1635 ± 8, rank #580 of 2168 rated models, from 282 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| ShatterMed-QA (Chinese, Easy) | 98.59 | Accuracy (%) on the 2,616 Chinese Easy multiple-choice clini | 100 |
| ShatterMed-QA (English, Hard) | 97.87 | Accuracy (%) on the 1,692 English Hard multiple-choice clini | 100 |
| SnorkelSpatial | 84.85 | Accuracy@1 (%, 330 spatial reasoning questions) | 96.9 |
| LiveOIBench | 69.8 | Avg Human Percentile | 96.5 |
| NYT Connections Older Models | 88 | Score (%) | 96 |
| SnorkelGraph | 75 | Accuracy@1 (%, 200 graph reasoning questions) | 95.3 |
| ShatterMed-QA (English, Easy) | 98.18 | Accuracy (%) on the 5,923 English Easy multiple-choice clini | 95 |
| AA LiveCodeBench | 83.17 | Pass@1 (%) | 94.4 |
| Horangi 4 - HRM8K | 96 | Accuracy (%) | 93.8 |
| LLM2014 Logic 2025-09 | 67.59 | Median Score | 93.3 |
| ShatterMed-QA (Chinese, Hard) | 96.64 | Accuracy (%) on the 327 Chinese Hard multiple-choice clinica | 92.5 |
| TaxEval v2 | 75.7 | Score (%) | 92.4 |
Interactive version: theaggregate.ai/model?slug=grok-4-fast-reasoning · How It Works · Data refreshed daily, snapshot 2026-10-20.