GPT-4.1 Nano vs GPT-5.5
Head to head on 13 shared benchmarks, with price, context window, and release dates.
Benchmark scores
72evals · sort by any column, ⤢ to expand fullscreen
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| GPT-5.5 OpenAI | 68.4% | 1844elo | 78.2 | 51.7% | 76.8% | 13.7% | 46.1% | 88.6% | 68.8% | 47.3% | 75.0% | 49.2% | 69.3% | - | - | - | 86.2% | 54.2% | - | 12.9% | - | - | 36.2% | - | - | - | 86.0% | 90.0% | 100.0% | 1315elo | 34.0% | 51.8% | 5.7% | 44.8% | - | 24.9% | 1769elo | 15.1% | - | 51.8% | - | 2.1% | 84.7% | 82.5% | 81.1% | 73.0% | 87.7% | 96.3% | 87.7% | - | - | - | 92.8% | 49.1% | 86.9% | 78.7% | 45.3% | 100.0% | 50.0% | 51.5% | 4.2 | - | 58.6% | 75.7% | 83.4% | - | - | 57.4% | 68.1% | 69.8% | - | - | 61.9% |
| GPT-4.1 Nano OpenAI | 42.1% | 944elo | 32.4 | 1.0% | 51.2% | 3.8% | 32.0% | 65.7% | 52.8% | 25.9% | 60.8% | 3.8% | 17.3% | 8.9% | 23.7% | 24.0% | - | - | 10.7% | - | 1.53 | -0.17 | - | 3.3% | 0.0% | 42.5% | - | - | - | - | - | - | - | - | 0.39 | - | - | - | 1.46 | - | 0.0% | - | - | - | - | - | - | - | - | 32.6% | 10.8% | 84.8% | - | - | - | - | - | - | - | - | - | 0.44 | - | - | - | 1.64 | 39.8% | - | - | - | 68.0% | 68.0% | 30.9% |
2 / 2 models
| Attribute | GPT-4.1 Nano OpenAI | GPT-5.5 OpenAI |
|---|---|---|
| Description | GPT-4.1 Nano 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 | 14 Apr 2025 | 23 Apr 2026 |
| Context | 1,047,576 | 1,050,000 |
| Input $/1M | $0.10 | $5.00 |
| Output $/1M | $0.40 | $30.00 |
| Cache read $/1M | $0.025 | $0.500 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | image, text, file | 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-4.1 Nano or GPT-5.5 better?
- Across the 13 benchmarks both models report on Sophon, GPT-5.5 leads on 13 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-4.1 Nano and GPT-5.5 compare on GPQA Diamond?
- GPT-4.1 Nano scores 51.2% and GPT-5.5 scores 76.8% on GPQA Diamond.
- Which is cheaper, GPT-4.1 Nano or GPT-5.5?
- GPT-4.1 Nano is cheaper at $0.40 per million output tokens against $30.00 for GPT-5.5 - about 75.0x.
- When were GPT-4.1 Nano and GPT-5.5 released?
- GPT-4.1 Nano was released 14 Apr 2025 by OpenAI. GPT-5.5 was released 23 Apr 2026 by OpenAI.
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