Compare / Claude Opus 5 vs grok-4-1-fast-reasoning
Claude Opus 5 vs grok-4-1-fast-reasoning
12 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Opus 5 | grok-4-1-fast-reasoning |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,488 | 1,413 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,486 | 1,417 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,472 | 1,414 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,543 | 1,438 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,497 | 1,401 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,491 | 1,430 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,482 | 1,407 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 50.8 | 20.4 |
| Artificial Analysisreported | GPQA Diamond% of questions | 93.7% | 85.3% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 54.9% | 19.3% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 82.0% | 74.0% |
| Vending-Bench 2reported | Money after a yearUS dollars | $11,181.87 | $1,106.63 |
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.