OpenAI
GPT-5.5 Instant benchmark results
4 results on 4 benchmarks from 2 sources.
Closed Released: May 5, 2026 Updated Oct 22, 2026
Also listed as: gpt-5.5-instant
All benchmark results
| Benchmarks | Score | Rank | Setting | Source type | Date |
|---|---|---|---|---|---|
| LMArena Text | 1473 | 42 | Overall, style control on; 27187 votes; 95% CI 1468–1478“gpt-5.5-instant” | Official leaderboard | Oct 8, 2026 |
| LMArena Vision | 1276 | 32 | Overall, style control on; 7605 votes; 95% CI 1267–1285“gpt-5.5-instant” | Official leaderboard | Oct 2, 2026 |
| GPQA Diamond | 82.5% | 103 | Epoch AI run, accuracy | Independent run | Aug 2, 2026 |
| AIME (OTIS Mock AIME 2024–2025) | 68.1% | 136 | Epoch AI run, OTIS Mock AIME 2024–2025 | Independent run | Aug 2, 2026 |
FAQ
Where do these GPT-5.5 Instant scores come from?
From Epoch AI Benchmarking Hub and LMArena leaderboard dataset. Each row links to the original leaderboard, dataset or report, and vendor-reported numbers are labelled.