OpenAIGPT-5.5 Pre Release
GPT-5.5 Pre Release is an OpenAI proprietary model, released 23 Apr 2026. It is not yet ranked: 3 independent results so far, and the index needs at least five across two categories. Last measured 23 Apr 2026.stale: no new result in six months
- Blended price
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- Output speed
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- First answer
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- Context
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- Full answer
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- Cost per run
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- Released
- 23 Apr 2026
- Reasoning67
- Coding64
- Maths67
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
Reasoning
| Benchmark | xhigh | Source |
|---|---|---|
| GPQA Diamond | 94.0%#12 | Epoch AI Benchmarking Hub |
Coding
| Benchmark | xhigh | Source |
|---|---|---|
| SWE-bench Verified (Epoch) | 80.6%#2 | Epoch AI Benchmarking Hub |
Maths
| Benchmark | xhigh | Source |
|---|---|---|
| OTIS Mock AIME | 100.0%#1 | Epoch AI Benchmarking Hub |
Where it wins
Benchmarks where this configuration ranks in the top five of every configuration measured.
More from OpenAI
See also
Questions people ask
- Why does GPT-5.5 Pre Release have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories; as of 24 Oct 2026 GPT-5.5 Pre Release has 3 that count. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- When was GPT-5.5 Pre Release released?
- OpenAI released GPT-5.5 Pre Release on 23 Apr 2026.
Data as of 24 Oct 2026. Compare with another model.
Cite as: BenchLeader, “GPT-5.5 Pre Release: benchmarks, pricing, speed and rank”, data as of 24 Oct 2026, https://www.benchleader.com/models/gpt-5-5-pre-release.