Compare / GPT-5.5 vs GLM 5.1
GPT-5.5 vs GLM 5.1
16 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-5.5 | GLM 5.1 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,486 | 1,456 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,489 | 1,465 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,452 | 1,448 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,513 | 1,495 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,478 | 1,460 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,481 | 1,465 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,470 | 1,453 |
| OpenHands Indexreported | Average% resolved | 65.9% | 58.2% |
| OpenHands Indexreported | Front end (SWE-Bench Multimodal)% resolved | 38.2% | 41.2% |
| OpenHands Indexreported | Greenfield (Commit0)% resolved | 43.8% | 37.5% |
| OpenHands Indexreported | Information gathering (GAIA)% resolved | 86.1% | 67.3% |
| OpenHands Indexreported | Issue resolution (SWE-Bench)% resolved | 78.2% | 75.0% |
| OpenHands Indexreported | Testing (SWT-Bench)% resolved | 83.4% | 70.2% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 13.0% | 9.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.41 | 0.38 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 69.7 | 61.7 |
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.