Compare / Claude Opus 5.5 vs GPT-6 Astra
Claude Opus 5.5 vs GPT-6 Astra
55 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 Opus 5.5 | GPT-6 Astra |
|---|---|---|---|
| BulletBenchmeasured by us | Cost per gameUS dollars | $0.18 | $0.28 |
| BulletBenchmeasured by us | Games lost on time% of games | 62.5% | 37.5% |
| BulletBenchmeasured by us | Invalid moves% of moves | 0.0% | 0.0% |
| BulletBenchmeasured by us | Ladder Eloladder Elo | 557 | 839 |
| BulletBenchmeasured by us | Median move timemilliseconds | 7.5 s | 5.6 s |
| CatalogBenchmeasured by us | Channel rules broken% of products | 0.6% | 0.0% |
| CatalogBenchmeasured by us | Content quality% of checks | 96.6% | 98.8% |
| 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% | 5.4% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 3.6% | 70.2% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 0.0% | 66.1% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 4.36 | 0.18 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 95.2% | 5.4% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 20.2% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 1.8% |
| 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 | 97.2% | 98.3% |
| CatalogBenchmeasured by us | Cost per productUS dollars | $0.0400 | $0.0371 |
| CatalogBenchmeasured by us | Decision accuracy% of decisions | 96.6% | 98.1% |
| CatalogBenchmeasured by us | Failed outputs% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Field accuracy% of missing fields | 92.2% | 94.2% |
| CatalogBenchmeasured by us | Invented values% of filled values | 0.5% | 1.9% |
| CatalogBenchmeasured by us | Missing UK information% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Not findable% of products | 3.0% | 6.0% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 58.3% | 74.4% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 39.3% | 71.4% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 0.83 | 0.14 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 30.9% | 4.2% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 17.3% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 1.8% |
| ROASBenchmeasured by us | Audience scorescore out of 100 | 67.7 | 68.6 |
| ROASBenchmeasured by us | Business scorescore out of 100 | 52.3 | 57.5 |
| ROASBenchmeasured by us | Consistency scorescore out of 100 | 33.8 | 44.7 |
| ROASBenchmeasured by us | Contribution profitsimulated £ | 911,566 | 599,139 |
| ROASBenchmeasured by us | Cost of a runUS dollars | $1.06 | $1.23 |
| ROASBenchmeasured by us | Months over budgetmonths of 12 | 0 | 0 |
| ROASBenchmeasured by us | Overall scorescore out of 100 | 51.6 | 56.6 |
| ROASBenchmeasured by us | Planning scorescore out of 100 | 54.6 | 54.9 |
| ROASBenchmeasured by us | Return on ad spendprofit per £1 spent | £0.69 | £0.67 |
| Arena (formerly LMArena)reported | Confirmed task successIPS effect estimate | 0.16 | 0.13 |
| Arena (formerly LMArena)reported | Praise over complaintIPS effect estimate | 0.19 | 0.34 |
| Arena (formerly LMArena)reported | SteerabilityIPS effect estimate | 0.14 | -0.01 |
| Arena (formerly LMArena)reported | Tool groundingIPS effect estimate | 0.00 | 0.00 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,499 | 1,483 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,521 | 1,453 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,556 | 1,510 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,516 | 1,473 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,509 | 1,478 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,520 | 1,469 |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 2.0% | 0.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.43 | 0.38 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 70.0 | 68.9 |
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.