Compare / GPT-5 Nano vs Grok 4.5
GPT-5 Nano vs Grok 4.5
11 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | GPT-5 Nano | Grok 4.5 |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,339 | 1,465 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,247 | 1,452 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,354 | 1,488 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,327 | 1,462 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,338 | 1,465 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,289 | 1,459 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 13.0 | 38.8 |
| Artificial Analysisreported | GPQA Diamond% of questions | 67.6% | 93.1% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 9.5% | 42.7% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 45.0% | 79.3% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 11.7% | 48.3% |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.