Compare / GPT-5.4 Nano vs GPT-5.5
GPT-5.4 Nano vs GPT-5.5
9 results from 2 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | GPT-5.4 Nano | GPT-5.5 |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,418 | 1,486 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,405 | 1,489 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,335 | 1,452 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,438 | 1,513 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,387 | 1,478 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,401 | 1,481 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,362 | 1,470 |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 100.0% | 100.0% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 3.1% | 9.3% |
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.