OpenAI·released 2026-05-051 source
GPT-5.5 Instant benchmark scores: 5 benchmarks tracked. 100% of its scores are independently reproduced — the rest are self-reported or unverified.
Leads on 0 of 5 benchmarks·best result 76.68 on GPQA diamond (reproduced)·5 of 5 independently reproduced
| Benchmark | Score | Evidence status | Measured |
|---|---|---|---|
| GPQA diamond | 76.68accuracy (%) | reproduced· optimizedT1 | 2026-05-05Epoch AI |
| OTIS Mock AIME 2024-2025 | 68.02accuracy (%) | reproduced· optimizedT1 | 2026-05-05Epoch AI |
| FrontierMath-Tiers-1-3-v2-Private | 26.32accuracy (%) | reproducedT1 | 2026-05-05Epoch AI |
| Chess Puzzles | 7.41accuracy (%) | reproducedT1 | 2026-05-05Epoch AI |
| FrontierMath-Tier-4-v2-Private | 2.44accuracy (%) | reproducedT1 | 2026-05-05Epoch AI |
Claims drawn from cited facts, not live model generation.
This model was developed by OpenAI and released in 2026. Its 2026 vintage places it among the company's more recent offerings, so it reflects the developer's current design and training practices rather than an earlier generation.
4 cited facts
This model is scored on 5 tracked benchmarks, and it holds no current top score. Its record is independently reproduced, so outside evaluation backs the scores up.
3 cited facts
Its mean gap to the best recorded score across its tracked benchmarks is 56.13 points.
1 cited fact
1 facts cross-checked across data sources: 1 single-source.
Source facts, citations, and refresh stamp for this record.
Sources: epoch_benchmarks
GPT-5.5 Instant is an AI model developed by OpenAI, released 2026-05-05. Its benchmark record below tags every score as independently reproduced, self-reported, or unverified.
GPT-5.5 Instant has recorded scores on 5 benchmarks, each shown with its evidence status.
GPT-5.5 Instant has recorded scores on 5 benchmarks — GPQA diamond, OTIS Mock AIME 2024-2025, Chess Puzzles, FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private. The full table above shows each score with its evidence status.
5 of 5 recorded scores (100%) are independently reproduced rather than self-reported by the lab.
GPT-5.5 Instant has 5 tracked claims: 5 independently reproduced.