Compare / Claude Opus 5.5 vs GPT-6 Luna
Claude Opus 5.5 vs GPT-6 Luna
52 results from 4 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Opus 5.5 | GPT-6 Luna |
|---|---|---|---|
| BulletBenchmeasured by us | Cost per gameUS dollars | $0.18 | $0.0072 |
| BulletBenchmeasured by us | Games lost on time% of games | 62.5% | 50.0% |
| BulletBenchmeasured by us | Invalid moves% of moves | 0.0% | 0.0% |
| BulletBenchmeasured by us | Ladder Eloladder Elo | 557 | 557 |
| BulletBenchmeasured by us | Median move timemilliseconds | 7.5 s | 7.0 s |
| CatalogBenchmeasured by us | Channel rules broken% of products | 0.6% | 0.0% |
| CatalogBenchmeasured by us | Content quality% of checks | 97.7% | 97.8% |
| 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 | 1.8% | 10.1% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 37.5% | 69.0% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 17.9% | 55.4% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 1.61 | 0.32 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 57.1% | 7.7% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 19.1% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 0.0% |
| CatalogBenchmeasured by us | Channel compliance% of products | 100.0% | 100.0% |
| CatalogBenchmeasured by us | Channel rules broken% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Conflicts caught% of conflicts | 100.0% | 100.0% |
| CatalogBenchmeasured by us | Content quality% of checks | 97.8% | 97.3% |
| CatalogBenchmeasured by us | Cost per productUS dollars | $0.0400 | $0.0005 |
| CatalogBenchmeasured by us | Decision accuracy% of decisions | 97.8% | 97.1% |
| CatalogBenchmeasured by us | Failed outputs% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Field accuracy% of missing fields | 92.2% | 93.7% |
| CatalogBenchmeasured by us | Invented values% of filled values | 0.5% | 1.7% |
| CatalogBenchmeasured by us | Missing UK information% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Not findable% of products | 3.0% | 10.1% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 72.6% | 66.7% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 58.9% | 55.4% |
| CatalogBenchmeasured by us | Unsupported claims% of products | 14.9% | 9.5% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 0.41 | 0.30 |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 18.4% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 1.8% |
| ROASBenchmeasured by us | Audience scorescore out of 100 | 67.7 | 68.2 |
| ROASBenchmeasured by us | Business scorescore out of 100 | 52.3 | 54.8 |
| ROASBenchmeasured by us | Consistency scorescore out of 100 | 33.8 | 35.8 |
| ROASBenchmeasured by us | Contribution profitsimulated US dollars | $911,566 | $738,878 |
| ROASBenchmeasured by us | Cost of a runUS dollars | $1.06 | $0.0142 |
| ROASBenchmeasured by us | Months over budgetmonths of 12 | 0 | 0 |
| ROASBenchmeasured by us | Overall scorescore out of 100 | 51.6 | 53.4 |
| ROASBenchmeasured by us | Planning scorescore out of 100 | 54.6 | 54.8 |
| ROASBenchmeasured by us | Return on ad spendprofit per $1 spent | $0.69 | $0.66 |
| Arena (formerly LMArena)reported | Confirmed task successIPS effect estimate | 0.16 | 0.05 |
| Arena (formerly LMArena)reported | Praise over complaintIPS effect estimate | 0.19 | -0.03 |
| Arena (formerly LMArena)reported | SteerabilityIPS effect estimate | 0.14 | 0.02 |
| Arena (formerly LMArena)reported | Tool groundingIPS effect estimate | 0.00 | 0.00 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,499 | 1,452 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,521 | 1,403 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,556 | 1,505 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,516 | 1,443 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,509 | 1,442 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,520 | 1,415 |
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.