Compare / Claude Opus 4.5 vs GPT-4.1 Nano
Claude Opus 4.5 vs GPT-4.1 Nano
14 results from 2 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 | GPT-4.1 Nano |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,472 | 1,321 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,469 | 1,307 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,503 | 1,313 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,483 | 1,300 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,474 | 1,322 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,467 | 1,299 |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Irrelevance detection% correct | 90.8% | 83.4% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Memory% correct | 73.8% | 18.9% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Multi-turn tasks% correct | 68.4% | 23.6% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Overall accuracy% correct | 77.5% | 33.0% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Relevance detection% correct | 68.8% | 93.8% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Single-turn calls (curated)% correct | 89.7% | 73.0% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Single-turn calls (user-contributed)% correct | 79.8% | 60.8% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Web search% correct | 84.5% | 11.0% |
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.