Compare / Claude Opus 4.5 vs Muse Spark 1.2
Claude Opus 4.5 vs Muse Spark 1.2
12 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 Opus 4.5 | Muse Spark 1.2 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,459 | 1,484 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,472 | 1,519 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,469 | 1,448 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,503 | 1,502 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,483 | 1,475 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,474 | 1,496 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,467 | 1,472 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 29.1 | 39.6 |
| Artificial Analysisreported | GPQA Diamond% of questions | 86.6% | 90.4% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 30.1% | 45.5% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 77.3% | 79.0% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 45.7% | 60.3% |
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.