3 vs 0 benchmarks won
OpenAI GPT-5.1 | OpenAI gpt-oss-120b | |
|---|---|---|
| Overview | ||
| Company | OpenAI | OpenAI |
| Release date | Nov 12 2025 | Aug 5 2025 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | 88.1% | — |
Software engineering SWE-Bench Verified | 76.3% | — |
Multimodal understanding MMMU | 76% | — |
| Timeline | ||
| Release gap | gpt-oss-120b shipped 99 days before GPT-5.1 | |
GPT-5.1 leads gpt-oss-120b on 3 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). gpt-oss-120b shipped 99 days before GPT-5.1, so benchmark comparisons should account for the intervening progress.
gpt-oss-120b is an open-source / open-weight model; GPT-5.1 is proprietary.
Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.