Gemini 3.1 Pro Preview vs GPT-5.5
Head to head on 41 shared benchmarks, with price, context window, and release dates.
Benchmark scores
59evals · sort by any column, ⤢ to expand fullscreen
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.5 OpenAI | 86.2% | 12.9% | 36.2% | 68.4% | 86.0% | 1315elo | 1844elo | 78.2 | 51.8% | 51.7% | 44.8% | 24.9% | 1769elo | 76.8% | 15.1% | 13.7% | 46.1% | 2.1% | 84.7% | 82.5% | 81.1% | 73.0% | 87.7% | 96.3% | 87.7% | 92.8% | 49.1% | 86.9% | 68.8% | 78.7% | 50.0% | 51.5% | 47.3% | 58.6% | 75.0% | 83.4% | 49.2% | 57.4% | 68.1% | 69.8% | 69.3% | 54.2% | - | 90.0% | 100.0% | - | - | 34.0% | 5.7% | - | 51.8% | - | 88.6% | 45.3% | 100.0% | - | 4.2 | 75.7% | - | 61.9% |
| Gemini 3.1 Pro Preview Google (Alphabet Inc.) | 76.8% | 12.3% | 26.5% | 64.5% | 22.0% | 1142elo | 1489elo | 68.2 | 43.0% | 36.9% | 42.5% | 16.7% | 1314elo | 94.1% | 15.1% | 47.0% | 77.1% | 0.0% | 82.4% | 76.5% | 78.5% | 79.1% | 85.4% | 91.0% | 84.0% | 86.3% | 59.1% | 76.1% | 69.4% | 76.2% | 26.0% | 48.7% | 58.9% | 54.2% | 72.9% | 70.7% | 53.8% | 41.9% | 56.1% | 32.0% | 95.6% | - | 2 | - | - | 73.1% | 22.8% | - | - | 93.2% | - | 84.4% | - | - | - | 72.7% | - | - | 79.4 | 58.9% |
2 / 2 models
| Attribute | Gemini 3.1 Pro Preview Google (Alphabet Inc.) | GPT-5.5 OpenAI |
|---|---|---|
| Description | Gemini 3.1 Pro Preview is an AI model from Google (Alphabet Inc.). | GPT-5.5 is an AI model from OpenAI. |
| Family | Gemini | GPT |
| Params | - | - |
| Open weights | - | closed |
| License | - | proprietary |
| Released | 19 Feb 2026 | 23 Apr 2026 |
| Context | 1,048,576 | 1,050,000 |
| Input $/1M | $2.00 | $5.00 |
| Output $/1M | $12.00 | $30.00 |
| Cache read $/1M | $0.200 | $0.500 |
| Cache write $/1M | $0.375 | - |
| Speed | 122 tok/s | 0 tok/s |
| Latency | 20.68 s | 0.00 s |
| Modalities | audio, file, image, text, video | file, image, text |
| Providers | - | - |
| Publisher | Google (Alphabet Inc.) | OpenAI |
| Reported scores | GPQA Diamond94.1% (AA) Humanity's Last Exam (HLE)47.0% (AA) IFBench77.1% (AA) SciCode58.9% (AA) τ²-bench (Tau²-bench)95.6% (AA) | 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 Gemini 3.1 Pro Preview or GPT-5.5 better?
- Across the 41 benchmarks both models report on Sophon, GPT-5.5 leads on 31 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Gemini 3.1 Pro Preview and GPT-5.5 compare on GPQA Diamond?
- Gemini 3.1 Pro Preview scores 94.1% and GPT-5.5 scores 76.8% on GPQA Diamond.
- Which is cheaper, Gemini 3.1 Pro Preview or GPT-5.5?
- Gemini 3.1 Pro Preview is cheaper at $12.00 per million output tokens against $30.00 for GPT-5.5 - about 2.5x.
- When were Gemini 3.1 Pro Preview and GPT-5.5 released?
- Gemini 3.1 Pro Preview was released 19 Feb 2026 by Google (Alphabet Inc.). GPT-5.5 was released 23 Apr 2026 by OpenAI.
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