GPT-5.4 vs gpt-oss-120b
Head to head on 18 shared benchmarks, with price, context window, and release dates.
Benchmark scores
52evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.4 OpenAI | 65.3% | 81.0% | 1836elo | 78.3 | 74.8% | 11.3% | 48.4% | 82.0% | 77.5% | 79.3% | 70.2% | 82.6% | 94.1% | 88.1% | 47.1% | 74.0% | 37.9% | 36.0% | - | - | 13.1% | - | - | 1.47 | 34.1% | 9.0% | 1272elo | 47.6% | 87.2% | - | 78.5% | 92063 | - | - | - | 82.8% | 41.3% | 77.5% | - | - | 68.3% | 86 | 52.2% | 56.0% | 43.3% | -0.61 | - | 40.8 | - | - | 80 | 67.4% | 60.3% |
| gpt-oss-120b OpenAI | 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% | 36.0% | 71.6% | 5.3% | 45.0% | 41.8% | 66.7% | - | 38.9% | 7.6% | - | - | - | - | - | - | 57.6 | - | - | 70.7% | 1.62 | 1.53 | - | - | - | 80.0% | 77.5% | - | - | - | - | - | - | 97.9% | - | 26.0% | 65.6% | - | - | 49.6% |
2 / 2 models
| Attribute | GPT-5.4 OpenAI | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GPT-5.4 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 | 5 Mar 2026 | 5 Aug 2025 |
| Context | 1,050,000 | 131,072 |
| Input $/1M | $2.50 | $0.15 |
| Output $/1M | $15.00 | $0.60 |
| Cache read $/1M | $0.250 | $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 Diamond74.8% (AA) SciCode47.1% (AA) τ²-bench (Tau²-bench)36.0% (AA) Terminal-Bench (Hard)37.9% (AA) Vibe Code Bench v1.167.4% | 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 or gpt-oss-120b better?
- Across the 18 benchmarks both models report on Sophon, GPT-5.4 leads on 16 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5.4 and gpt-oss-120b compare on GPQA Diamond?
- GPT-5.4 scores 74.8% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, GPT-5.4 or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $15.00 for GPT-5.4 - about 25.0x.
- When were GPT-5.4 and gpt-oss-120b released?
- GPT-5.4 was released 5 Mar 2026 by OpenAI. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
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