Compare / GPT-5 Nano vs GPT-6 Astra
GPT-5 Nano vs GPT-6 Astra
13 results from 4 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | GPT-5 Nano | GPT-6 Astra |
|---|---|---|---|
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,339 | 1,483 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,247 | 1,453 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,354 | 1,510 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,327 | 1,473 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,338 | 1,478 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,289 | 1,469 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 13.0 | 52.7 |
| Artificial Analysisreported | GPQA Diamond% of questions | 67.6% | 96.3% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 9.5% | 54.7% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 45.0% | 80.7% |
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 11.7% | 75.6% |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 100.0% | 100.0% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 10.5% | 8.7% |
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.