Compare / Claude Opus 5.5 vs Mistral Medium 3.5
Claude Opus 5.5 vs Mistral Medium 3.5
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 | Mistral Medium 3.5 |
|---|---|---|---|
| BulletBenchmeasured by us | Cost per gameUS dollars | $0.18 | $0.0261 |
| BulletBenchmeasured by us | Games lost on time% of games | 62.5% | 0.0% |
| BulletBenchmeasured by us | Invalid moves% of moves | 0.0% | 0.4% |
| BulletBenchmeasured by us | Ladder Eloladder Elo | 557 | 555 |
| BulletBenchmeasured by us | Median move timemilliseconds | 7.5 s | 0.5 s |
| CatalogBenchmeasured by us | Channel rules broken% of products | 0.6% | 3.0% |
| CatalogBenchmeasured by us | Content quality% of checks | 97.7% | 94.0% |
| 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% | 11.9% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 17.9% | 7.1% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 1.61 | 4.45 |
| CatalogBenchmeasured by us | Unsupported claims% of products | 57.1% | 83.9% |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 36.3% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 13.1% |
| 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% | 90.9% |
| CatalogBenchmeasured by us | Content quality% of checks | 97.8% | 94.3% |
| CatalogBenchmeasured by us | Cost per productUS dollars | $0.0400 | $0.0080 |
| CatalogBenchmeasured by us | Decision accuracy% of decisions | 97.8% | 92.5% |
| CatalogBenchmeasured by us | Failed outputs% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Field accuracy% of missing fields | 92.2% | 91.7% |
| CatalogBenchmeasured by us | Invented values% of filled values | 0.5% | 0.0% |
| CatalogBenchmeasured by us | Missing UK information% of products | 0.0% | 0.0% |
| CatalogBenchmeasured by us | Not findable% of products | 3.0% | 14.3% |
| CatalogBenchmeasured by us | Publish-ready listings% of products | 72.6% | 29.2% |
| CatalogBenchmeasured by us | Reliably publish-ready% of products | 58.9% | 19.6% |
| CatalogBenchmeasured by us | Unsupported claims% of products | 14.9% | 51.2% |
| CatalogBenchmeasured by us | Unsupported claimsclaims per product | 0.41 | 1.76 |
| CatalogBenchmeasured by us | Wrong attributes% of products | 15.5% | 30.9% |
| CatalogBenchmeasured by us | Wrong category or variant% of products | 1.8% | 11.3% |
| ROASBenchmeasured by us | Audience scorescore out of 100 | 67.7 | 28.5 |
| ROASBenchmeasured by us | Business scorescore out of 100 | 52.3 | 3.4 |
| ROASBenchmeasured by us | Consistency scorescore out of 100 | 33.8 | 8.7 |
| ROASBenchmeasured by us | Contribution profitsimulated US dollars | $911,566 | −$159,882 |
| ROASBenchmeasured by us | Cost of a runUS dollars | $1.06 | $0.15 |
| ROASBenchmeasured by us | Months over budgetmonths of 12 | 0 | 3 |
| ROASBenchmeasured by us | Overall scorescore out of 100 | 51.6 | 15.2 |
| ROASBenchmeasured by us | Planning scorescore out of 100 | 54.6 | 55.2 |
| ROASBenchmeasured by us | Return on ad spendprofit per $1 spent | $0.69 | −$0.17 |
| Arena (formerly LMArena)reported | Confirmed task successIPS effect estimate | 0.16 | -0.16 |
| Arena (formerly LMArena)reported | Praise over complaintIPS effect estimate | 0.19 | -0.15 |
| Arena (formerly LMArena)reported | SteerabilityIPS effect estimate | 0.14 | -0.07 |
| Arena (formerly LMArena)reported | Tool groundingIPS effect estimate | 0.00 | -0.02 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,499 | 1,430 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,521 | 1,398 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,556 | 1,434 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,516 | 1,421 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,509 | 1,426 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,520 | 1,404 |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 2.0% | 18.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.43 | 0.35 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 70.0 | 45.5 |
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.