GPT-5 Mini vs gpt-oss-120b
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
71evals · sort by any column, ⤢ to expand fullscreen
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| gpt-oss-120b OpenAI | 41.8% | 66.7% | 38.9% | 58.2% | 959elo | 35.8 | 67.2% | 5.9% | 58.3% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 70.7% | 1.62 | 1.53 | 77.5% | 36.0% | 26.0% | 71.6% | 5.3% | 45.0% | - | - | 7.6% | - | - | - | - | - | 13.0% | - | - | - | - | - | - | - | - | - | - | - | 57.6 | - | - | - | - | - | - | 80.0% | - | - | - | - | - | 97.9% | - | - | 65.6% | - | - | - | - | - | - | - | - | - | 49.6% |
| GPT-5 Mini OpenAI | 0.0% | 46.7% | 0.0% | 60.2% | 1310elo | 56.2 | 68.7% | 5.1% | 45.6% | 69.1% | 68.2% | 55.2% | 65.3% | 75.5% | 82.2% | 68.3% | 54.5% | 1.54 | 1.54 | 77.5% | 36.9% | 59.8% | 75.2% | 14.4% | 31.9% | 0.0% | 1.13 | - | -0.15 | 20.0% | 25.0% | 40.0% | 1.7 | - | 100.0% | 18.1% | 2.8% | 100.0% | 66.7% | 0.0% | 88.3% | 27.2% | 60.0% | 100.0% | 90.0% | - | 47.2% | 80.0% | 0.0% | 43.0% | 80.6% | 80.0% | - | 66.9% | 9.0% | 43.0% | 16.8% | 4.95 | - | 39.7% | 0.0% | - | 9.5% | 0.0% | 86.1% | 0.49 | 39.21 | 272.11 | 14.2% | 86.0% | 86.0% | 47.9% |
2 / 2 models
| Attribute | GPT-5 Mini OpenAI | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GPT-5 mini is an AI model from OpenAI. | GPT-Oss 120b is an AI model from OpenAI, released with open weights. |
| Family | GPT | GPT |
| Params | - | - |
| Open weights | closed | open |
| License | proprietary | apache-2.0 |
| Released | 7 Aug 2025 | 5 Aug 2025 |
| Context | 400,000 | 131,072 |
| Input $/1M | $0.25 | $0.15 |
| Output $/1M | $2.00 | $0.60 |
| Cache read $/1M | $0.025 | $0.030 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 186 tok/s |
| Latency | 0.00 s | 0.50 s |
| Modalities | text, image, file | text |
| Providers | - | - |
| Publisher | OpenAI | OpenAI |
| Reported scores | GPQA Diamond67.2% (AA) Humanity's Last Exam (HLE)5.9% (AA) LiveCodeBench70.7% (AA) MMLU-Pro77.5% (AA) SciCode36.0% (AA) |
FAQ
- Is GPT-5 Mini or gpt-oss-120b better?
- Across the 25 benchmarks both models report on Sophon, GPT-5 Mini leads on 16 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5 Mini and gpt-oss-120b compare on GPQA Diamond?
- GPT-5 Mini scores 68.7% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, GPT-5 Mini or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $2.00 for GPT-5 Mini - about 3.3x.
- When were GPT-5 Mini and gpt-oss-120b released?
- GPT-5 Mini was released 7 Aug 2025 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
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