Compare / Claude Haiku 4.5 vs Claude Opus 5.5
Claude Haiku 4.5 vs Claude Opus 5.5
51 results from 5 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Haiku 4.5 | Claude Opus 5.5 |
|---|---|---|---|
| BulletBenchmeasured by us | Cost per gameUS dollars | $0.0318 | $0.18 |
| BulletBenchmeasured by us | Games lost on time% of games | 0.0% | 62.5% |
| BulletBenchmeasured by us | Invalid moves% of moves | 0.9% | 0.0% |
| BulletBenchmeasured by us | Ladder Eloladder Elo | 491 | 557 |
| BulletBenchmeasured by us | Median move timemilliseconds | 1.3 s | 7.5 s |
| CatalogBenchmeasured by us | Channel rules broken% of products | 39.3% | 0.6% |
| CatalogBenchmeasured by us | Content quality% of checks | 94.4% | 96.6% |
| CatalogBenchmeasured by us | Failed outputs% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Missing UK information% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Not findable% of products | 6.5% | 1.8% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 0.0% | 3.6% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 14.3 | 4.36 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 99.4% | 95.2% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 51.2% | 15.5% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 6.5% | 1.8% |
| CatalogBenchmeasured by us | Channel compliance% of products | 76.8% | 100.0% |
| CatalogBenchmeasured by us | Channel rules broken% of products | 23.2% | 0.0% |
| CatalogBenchmeasured by us | Conflicts caught% of conflicts | 100.0% | 100.0% |
| CatalogBenchmeasured by us | Content quality% of checks | 94.6% | 97.2% |
| CatalogBenchmeasured by us | Cost per productUS dollars | $0.0061 | $0.0400 |
| CatalogBenchmeasured by us | Decision accuracy% of decisions | 86.0% | 96.6% |
| CatalogBenchmeasured by us | Failed outputs% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Field accuracy% of missing fields | 93.7% | 92.2% |
| CatalogBenchmeasured by us | Invented values% of filled values | 6.2% | 0.5% |
| CatalogBenchmeasured by us | Missing UK information% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Not findable% of products | 8.9% | 3.0% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 0.6% | 58.3% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 0.0% | 39.3% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 7.92 | 0.83 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 94.0% | 30.9% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 48.2% | 15.5% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 7.7% | 1.8% |
| ROASBenchmeasured by us | Audience scorescore out of 100 | 30.9 | 67.7 |
| ROASBenchmeasured by us | Business scorescore out of 100 | 7.3 | 52.3 |
| ROASBenchmeasured by us | Consistency scorescore out of 100 | 8.7 | 33.8 |
| ROASBenchmeasured by us | Contribution profitsimulated £ | -205,001 | 911,566 |
| ROASBenchmeasured by us | Cost of a runUS dollars | $0.0298 | $1.06 |
| ROASBenchmeasured by us | Months over budgetmonths of 12 | 2 | 0 |
| ROASBenchmeasured by us | Overall scorescore out of 100 | 17.5 | 51.6 |
| ROASBenchmeasured by us | Planning scorescore out of 100 | 54.4 | 54.6 |
| ROASBenchmeasured by us | Return on ad spendprofit per £1 spent | −£0.21 | £0.69 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,420 | 1,499 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,387 | 1,521 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,452 | 1,556 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,415 | 1,516 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,414 | 1,509 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,399 | 1,520 |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 6.0% | 2.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.39 | 0.43 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 52.2 | 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.