GPT-5 Nano vs gpt-oss-120b
Head to head on 22 shared benchmarks, with price, context window, and release dates.
Benchmark scores
58evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| gpt-oss-120b OpenAI | 93.4% | 961elo | 35.8 | 78.2% | 19.6% | 69.0% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 87.8% | 1.62 | 1.53 | 80.8% | 34.0% | 26.0% | 71.6% | 23.5% | 65.8% | - | 41.8% | 38.9% | 7.6% | - | - | - | 58.2% | 11.0% | - | - | - | - | - | 57.6 | - | - | - | - | - | 80.0% | - | - | - | - | - | - | 97.9% | - | 65.6% | - | - | - | - | - | - | 54.1% |
| GPT-5 Nano OpenAI | 83.7% | 705elo | 28 | 67.6% | 9.5% | 67.6% | 52.8% | 62.4% | 43.4% | 55.7% | 46.8% | 68.4% | 40.3% | 78.9% | 1.38 | 1.38 | 78.0% | 36.6% | 34.8% | 67.4% | 12.1% | 36.5% | 0.0% | - | - | - | 0.25 | 0.21 | 6.7% | - | - | 10.0% | 78.2% | 8.3% | 1.18 | 100.0% | - | 100.0% | 100.0% | 26.7% | 30.4% | 72.9% | - | 53.6% | 100.0% | 0.0% | 0.0% | 12.0% | 30.4% | - | 1.72 | - | 29.7% | 20.41 | -6.67 | 82.0% | 82.0% | 40.0% | 48.9% |
2 / 2 models
| Attribute | GPT-5 Nano OpenAI | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GPT-5 nano 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 | $0.05 | $0.15 |
| Output $/1M | $0.40 | $0.59 |
| Cache read $/1M | $0.005 | $0.075 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 209 tok/s |
| Latency | 0.00 s | 0.51 s |
| Modalities | text, image, file | text |
| Providers | - | - |
| Publisher | OpenAI | OpenAI |
| Reported scores | GPQA Diamond78.2% (AA) Humanity's Last Exam (HLE)19.6% (AA) LiveCodeBench87.8% (AA) MMLU-Pro80.8% (AA) SciCode34.0% (AA) |
FAQ
- Is GPT-5 Nano or gpt-oss-120b better?
- Across the 22 benchmarks both models report on Sophon, gpt-oss-120b leads on 15 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5 Nano and gpt-oss-120b compare on GPQA Diamond?
- GPT-5 Nano scores 67.6% and gpt-oss-120b scores 78.2% on GPQA Diamond.
- Which is cheaper, GPT-5 Nano or gpt-oss-120b?
- GPT-5 Nano is cheaper at $0.40 per million output tokens against $0.59 for gpt-oss-120b - about 1.5x.
- When were GPT-5 Nano and gpt-oss-120b released?
- GPT-5 Nano was released 7 Aug 2025 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
Other head-to-heads
56GPT-5 Mini vs GPT-5 Nano38 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsGPT-4.1 Mini vs GPT-5 Nano26 shared evalsGPT-5 Nano vs GPT-5.226 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsGPT-5 Mini vs gpt-oss-120b25 shared evalsClaude 4 Sonnet vs GPT-5 Nano25 shared evalsGemini 2.5 Pro vs GPT-5 Nano24 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsGPT-5 Nano vs GPT-5.523 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsGLM 4.7 vs GPT-5 Nano23 shared evalsDeepSeek V3.2 vs gpt-oss-120b23 shared evalsGemini 3.1 Pro Preview vs GPT-5 Nano22 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs GPT-5.422 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Opus 4.7 vs GPT-5 Nano22 shared evalsDeepSeek V3.2 vs GPT-5 Nano22 shared evalsGPT-4.1 Nano vs GPT-5 Nano22 shared evalsGPT-5.2 vs gpt-oss-120b22 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs gpt-oss-120b21 shared evalsGPT-4.1 vs GPT-5 Nano20 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsGPT-5.4 Mini vs GPT-5 Nano20 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGLM 4.7 vs gpt-oss-120b20 shared evalsGPT-5.5 vs gpt-oss-120b19 shared evalsGPT-5 Nano vs Qwen3.6 Plus19 shared evalsClaude Opus 4.6 vs gpt-oss-120b19 shared evalsgpt-oss-120b vs Kimi K2.519 shared evalsGLM 5.1 vs gpt-oss-120b19 shared evalsGemini 2.5 Pro vs gpt-oss-120b19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsGemini 3.1 Pro Preview vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsGPT-5.4 vs gpt-oss-120b18 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsClaude Opus 4.7 vs gpt-oss-120b18 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGPT-4o vs gpt-oss-120b17 shared evalsGPT-5.4 Mini vs gpt-oss-120b17 shared evalsGPT-4o-mini vs GPT-5 Nano16 shared evalsGPT-4.1 vs gpt-oss-120b16 shared evalsgpt-oss-120b vs Qwen3.6 Plus16 shared evalsGPT-4.1 Mini vs gpt-oss-120b15 shared evalsGPT-4o-mini vs gpt-oss-120b15 shared evalsGPT-4.1 Nano vs gpt-oss-120b14 shared evalsGPT-5 Nano vs GPT-6 Astra10 shared evalsGPT-6 Astra vs gpt-oss-120b6 shared evals
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