Claude 4 Sonnet vs Gemini 3.5 Flash
Head to head on 20 shared benchmarks, with price, context window, and release dates.
Benchmark scores
49evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 71.8 | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | 55.8% | 76.6% | 68.1% | 49.9% | 53.1% | 74.4% | 40.9% | 95.3% | - | - | - | - | 26.0% | - | 1087elo | - | 57.9% | 39.0% | - | - | - | 76.3% | - | - | - | 31.0% | - | - | - | - | - | - | 53.1% | 62.9% | 48.7% | - | - | 64.3% |
| Claude 4 Sonnet Anthropic | 54.7% | 58.4 | 77.7% | 10.7% | 54.7% | 64.8% | 77.5% | 54.6% | 44.3% | 72.9% | 70.5% | 69.0% | 33.9% | 72.4% | 62.5% | 35.0% | 40.0% | 69.6% | 31.1% | 64.6% | 77.3% | 74.3% | 22.9% | 47.8% | - | 19.8% | - | 1480elo | - | - | 67.5% | 65.5% | 99.1% | - | 86.7% | 84.2% | 43.9% | - | 6.18 | 6.18 | 58.3% | 35.6% | 74.6% | 0.59 | - | - | - | 84.0% | 84.0% | 59.6% |
2 / 2 models
| Attribute | Claude 4 Sonnet Anthropic | Gemini 3.5 Flash Google (Alphabet Inc.) |
|---|---|---|
| Description | Claude 4 Sonnet is an AI model from Anthropic. | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). |
| Family | Claude | Gemini |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 22 May 2025 | 19 May 2026 |
| Context | 200,000 | 1,048,576 |
| Input $/1M | $3.00 | $1.50 |
| Output $/1M | $15.00 | $9.00 |
| Cache read $/1M | - | $0.150 |
| Cache write $/1M | - | $0.083 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text, image, video, file, audio |
| Providers | - | - |
| Publisher | Anthropic | 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 Claude 4 Sonnet or Gemini 3.5 Flash better?
- Across the 20 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 4 Sonnet and Gemini 3.5 Flash compare on GPQA Diamond?
- Claude 4 Sonnet scores 77.7% and Gemini 3.5 Flash scores 92.2% on GPQA Diamond.
- Which is cheaper, Claude 4 Sonnet or Gemini 3.5 Flash?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $15.00 for Claude 4 Sonnet - about 1.7x.
- When were Claude 4 Sonnet and Gemini 3.5 Flash released?
- Claude 4 Sonnet was released 22 May 2025 by Anthropic. Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.).
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