OpenAIopen weightsCurrentReasoning
gpt-oss-120b
OpenAI's first open-weights release since GPT-2.
Aug 5, 2025
—
—
128K
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
SWE-bench Verified | 62.4% | #7 of 8 | leaderboard | benchlm.ai ↗ | |
GPQA Diamond | 80.1% | #19 of 21 | high reasoning, no tools · lab-reported | cdn.openai.com ↗ | |
Humanity's Last Exam | 14.9% | #29 of 31 | no tools, high reasoning; 19.0 with tools · lab-reported | cdn.openai.com ↗ | |
τ²-bench (Telecom) | 65.8% | #7 of 9 | leaderboard | benchlm.ai ↗ | |
Artificial Analysis Intelligence Index | 23.8 | #15 of 16 | leaderboard | benchlm.ai ↗ |