Compare / Claude Opus 5 vs GPT-5.1
Claude Opus 5 vs GPT-5.1
17 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 | GPT-5.1 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,490 | 1,416 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,488 | 1,459 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,486 | 1,448 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,472 | 1,428 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,543 | 1,482 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,497 | 1,450 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,491 | 1,456 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,482 | 1,437 |
| Artificial Analysisreported | Artificial Analysis Coding Indexindex score | 78.0 | 49.4 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 50.8 | 24.7 |
| Artificial Analysisreported | GPQA Diamond% of questions | 93.7% | 87.3% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 54.9% | 28.5% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 82.0% | 80.0% |
| Artificial Analysisreported | Terminal-Bench 2.1% of tasks | 89.1% | 52.4% |
| Artificial Analysisreported | Τ-bench banking% of tasks | 44.7% | 15.9% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 59.9% | 48.0% |
| Vending-Bench 2reported | Money after a yearUS dollars | $11,181.87 | $1,473.43 |
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.