Gemini 2.5 Pro vs Gemini 3.5 Flash
Head to head on 19 shared benchmarks, with price, context window, and release dates.
Benchmark scores
43evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 71.8 | 39.0% | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 75.6% | 84.6% | 55.8% | 76.6% | 68.1% | 49.9% | 53.1% | 74.4% | 40.9% | 48.7% | 95.3% | - | - | - | - | 26.0% | - | - | 1087elo | - | 57.9% | 64.9% | 88.2% | 82.0% | - | - | 76.3% | - | - | 31.0% | - | - | 53.1% | 62.9% | - | 64.3% |
| Gemini 2.5 Pro Google (Alphabet Inc.) | 60.8% | 58.8 | 14.1% | 84.4% | 22.5% | 48.7% | 77.9% | 86.7% | 81.0% | 65.9% | 50.6% | 73.6% | 68.9% | 41.9% | 42.8% | 72.9% | 26.5% | 0.4% | 54.1% | 83.1% | 88.7% | 87.7% | 50.4% | - | 45.2% | 15.9% | - | 1419elo | - | - | - | - | 80.1% | 96.7% | - | 86.2% | 70.0% | - | 55.6 | 53.6% | - | - | 53.3% | 59.5% |
2 / 2 models
| Attribute | Gemini 2.5 Pro Google (Alphabet Inc.) | Gemini 3.5 Flash Google (Alphabet Inc.) |
|---|---|---|
| Description | Gemini 2.5 Pro is an AI model from Google (Alphabet Inc.). | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). |
| Family | Gemini | Gemini |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 5 Jun 2025 | 19 May 2026 |
| Context | 1,048,576 | 1,048,576 |
| Input $/1M | $1.25 | $1.50 |
| Output $/1M | $10.00 | $9.00 |
| Cache read $/1M | $0.125 | $0.150 |
| Cache write $/1M | $0.375 | $0.083 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file, audio, video | text, image, video, file, audio |
| Providers | - | - |
| Publisher | Google (Alphabet Inc.) | Google (Alphabet Inc.) |
| Reported scores | Humanity's Last Exam (HLE)42.7% (AA) τ²-bench (Tau²-bench)95.3% (AA) Terminal-Bench (Hard)40.9% (AA) Vals Index53.1% |
FAQ
- Is Gemini 2.5 Pro or Gemini 3.5 Flash better?
- Across the 19 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 16 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Gemini 2.5 Pro and Gemini 3.5 Flash compare on GPQA Diamond?
- Gemini 2.5 Pro scores 84.4% and Gemini 3.5 Flash scores 92.2% on GPQA Diamond.
- Which is cheaper, Gemini 2.5 Pro or Gemini 3.5 Flash?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $10.00 for Gemini 2.5 Pro - about 1.1x.
- When were Gemini 2.5 Pro and Gemini 3.5 Flash released?
- Gemini 2.5 Pro was released 5 Jun 2025 by Google (Alphabet Inc.). Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.).
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