GPT-5.4 Mini vs GPT-5.5
Head to head on 26 shared benchmarks, with price, context window, and release dates.
Benchmark scores
56evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.5 OpenAI | 12.9% | 68.4% | 1844elo | 78.2 | 51.8% | 51.7% | 76.8% | 13.7% | 46.1% | 84.7% | 82.5% | 81.1% | 73.0% | 87.7% | 96.3% | 87.7% | 68.8% | 50.0% | 51.5% | 47.3% | 75.0% | 49.2% | 57.4% | 68.1% | 69.8% | 69.3% | 86.2% | 54.2% | 36.2% | 86.0% | 90.0% | 100.0% | - | - | 1315elo | 34.0% | 5.7% | 44.8% | 24.9% | 1769elo | 15.1% | 51.8% | - | 2.1% | 92.8% | 49.1% | 86.9% | 88.6% | 78.7% | 45.3% | 100.0% | 4.2 | 58.6% | 75.7% | 83.4% | - | 61.9% |
| GPT-5.4 Mini OpenAI | 37.0% | 60.9% | 1662elo | 73 | 45.4% | 28.3% | 60.6% | 5.9% | 38.8% | 70.9% | 71.6% | 70.9% | 60.3% | 71.5% | 78.6% | 72.5% | 63.5% | 21.0% | 50.8% | 39.6% | 71.2% | 18.2% | 39.6% | 54.2% | 48.0% | 23.4% | - | - | - | - | - | - | 21.2% | 3.9% | - | - | - | - | - | - | - | - | 80.3% | - | - | - | - | - | - | - | - | - | - | - | - | 61.7 | 48.4% |
2 / 2 models
| Attribute | GPT-5.4 Mini OpenAI | GPT-5.5 OpenAI |
|---|---|---|
| Description | GPT-5.4 mini is an AI model from OpenAI. | GPT-5.5 is an AI model from OpenAI. |
| Family | GPT | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 17 Mar 2026 | 23 Apr 2026 |
| Context | 400,000 | 1,050,000 |
| Input $/1M | $0.75 | $5.00 |
| Output $/1M | $4.50 | $30.00 |
| Cache read $/1M | $0.075 | $0.500 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | file, image, text |
| Providers | - | - |
| Publisher | OpenAI | OpenAI |
| Reported scores | GPQA Diamond76.8% (AA) Humanity's Last Exam (HLE)13.7% (AA) IFBench46.1% (AA) SciCode47.3% (AA) τ²-bench (Tau²-bench)69.3% (AA) |
FAQ
- Is GPT-5.4 Mini or GPT-5.5 better?
- Across the 26 benchmarks both models report on Sophon, GPT-5.5 leads on 25 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-5.5 compare on GPQA Diamond?
- GPT-5.4 Mini scores 60.6% and GPT-5.5 scores 76.8% on GPQA Diamond.
- Which is cheaper, GPT-5.4 Mini or GPT-5.5?
- GPT-5.4 Mini is cheaper at $4.50 per million output tokens against $30.00 for GPT-5.5 - about 6.7x.
- When were GPT-5.4 Mini and GPT-5.5 released?
- GPT-5.4 Mini was released 17 Mar 2026 by OpenAI. GPT-5.5 was released 23 Apr 2026 by OpenAI.
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