Compare / GPT-5 vs o3
GPT-5 vs o3
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 | GPT-5 | o3 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,183 | 1,192 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,421 | 1,405 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,413 | 1,426 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,373 | 1,383 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,460 | 1,449 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,410 | 1,403 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,435 | 1,432 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,397 | 1,396 |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 50.1% | 49.4% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 58.0% | 18.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.39 | 0.30 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 53.5 | 66.8 |
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.