Compare / Claude Opus 5 vs Claude Sonnet 4.5
Claude Opus 5 vs Claude Sonnet 4.5
8 results from 1 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Opus 5 | Claude Sonnet 4.5 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,490 | 1,449 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,488 | 1,449 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,486 | 1,461 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,472 | 1,454 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,543 | 1,498 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,497 | 1,464 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,491 | 1,457 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,482 | 1,454 |
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.