Compare / claude-3-opus-20240229 vs Claude Opus 5.5
claude-3-opus-20240229 vs Claude Opus 5.5
10 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-3-opus-20240229 | Claude Opus 5.5 |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,305 | 1,499 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,288 | 1,521 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,318 | 1,556 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,314 | 1,516 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,322 | 1,509 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,316 | 1,520 |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 12.6% | 72.2% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 20.0% | 2.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.35 | 0.43 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 54.3 | 70.0 |
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.