Compare / Claude Opus 5.5 vs GPT-5 Mini
Claude Opus 5.5 vs GPT-5 Mini
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 5.5 | GPT-5 Mini |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,499 | 1,381 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,521 | 1,324 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,556 | 1,400 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,516 | 1,373 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,509 | 1,390 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,520 | 1,352 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 57.6 | 20.6 |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 61.4% | 21.5% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 84.7% | 72.3% |
| Artificial Analysisreported | SciCode% of problems | 66.9% | 39.0% |
| Artificial Analysisreported | Terminal-Bench 4.0% of tasks | 59.6% | 0.0% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 72.2% | 21.6% |
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.