GPT-5.4 Mini vs gpt-oss-120b
Head to head on 17 shared benchmarks, with price, context window, and release dates.
Benchmark scores
44evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| gpt-oss-120b OpenAI | 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% | 36.0% | 71.6% | 5.3% | 45.0% | 41.8% | 66.7% | - | 38.9% | 7.6% | 13.0% | - | - | - | - | 57.6 | - | 70.7% | 1.62 | 1.53 | 80.0% | 77.5% | - | - | - | 97.9% | 26.0% | 65.6% | - | - | - | - | 49.6% |
| GPT-5.4 Mini OpenAI | 60.9% | 1662elo | 73 | 60.6% | 5.9% | 38.8% | 70.9% | 71.6% | 70.9% | 60.3% | 71.5% | 78.6% | 72.5% | 39.6% | 71.2% | 18.2% | 23.4% | - | - | 37.0% | - | - | - | 21.2% | 3.9% | 45.4% | 28.3% | - | 80.3% | - | - | - | - | - | 63.5% | 21.0% | 50.8% | - | - | - | 61.7 | 39.6% | 54.2% | 48.0% | 48.4% |
2 / 2 models
| Attribute | GPT-5.4 Mini OpenAI | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GPT-5.4 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 | 17 Mar 2026 | 5 Aug 2025 |
| Context | 400,000 | 131,072 |
| Input $/1M | $0.75 | $0.15 |
| Output $/1M | $4.50 | $0.60 |
| Cache read $/1M | $0.075 | $0.030 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 186 tok/s |
| Latency | 0.00 s | 0.50 s |
| Modalities | file, image, text | 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-5.4 Mini or gpt-oss-120b better?
- Across the 17 benchmarks both models report on Sophon, GPT-5.4 Mini leads on 12 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5.4 Mini and gpt-oss-120b compare on GPQA Diamond?
- GPT-5.4 Mini scores 60.6% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, GPT-5.4 Mini or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $4.50 for GPT-5.4 Mini - about 7.5x.
- When were GPT-5.4 Mini and gpt-oss-120b released?
- GPT-5.4 Mini was released 17 Mar 2026 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
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