GPT-5.2 vs gpt-oss-120b
Head to head on 22 shared benchmarks, with price, context window, and release dates.
Benchmark scores
52evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.2 OpenAI | 51.0% | 65.9% | 60.0% | 1699elo | 71.6 | 71.2% | 8.0% | 47.4% | 78.7% | 76.1% | 78.2% | 61.8% | 79.8% | 93.2% | 83.2% | 66.9% | 81.4% | 40.4% | 71.8% | 75.8% | 31.8% | 46.5% | - | 100 | - | - | 100.0% | 0.0% | 16.7% | 40.6% | 9.4% | 40.7% | 12.93 | - | 85.0% | 79.0% | 24.0% | - | - | 72.0% | 49.7% | 84.4% | - | 67.1% | 96.7 | 18.7% | 15.0% | 49.3% | - | 66.7% | - | 53.5% | 56.3% |
| gpt-oss-120b OpenAI | 66.7% | 58.2% | 13.0% | 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% | 77.5% | 36.0% | 26.0% | 71.6% | 5.3% | 45.0% | 41.8% | - | 38.9% | 7.6% | - | - | - | - | - | - | - | 57.6 | - | - | - | 1.62 | 1.53 | - | - | - | 80.0% | - | - | - | - | - | 97.9% | - | 65.6% | - | 49.6% |
2 / 2 models
| Attribute | GPT-5.2 OpenAI | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GPT-5.2 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 | 11 Dec 2025 | 5 Aug 2025 |
| Context | 400,000 | 131,072 |
| Input $/1M | $1.75 | $0.15 |
| Output $/1M | $14.00 | $0.60 |
| Cache read $/1M | $0.175 | $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-5.2 or gpt-oss-120b better?
- Across the 22 benchmarks both models report on Sophon, GPT-5.2 leads on 19 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5.2 and gpt-oss-120b compare on GPQA Diamond?
- GPT-5.2 scores 71.2% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, GPT-5.2 or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $14.00 for GPT-5.2 - about 23.3x.
- When were GPT-5.2 and gpt-oss-120b released?
- GPT-5.2 was released 11 Dec 2025 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
Comparing something else? Build your own side-by-side.