Claude Opus 4.8 vs Gemini 3.5 Flash
Head to head on 29 shared benchmarks, with price, context window, and release dates.
Benchmark scores
42evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 26.0% | 1087elo | 71.8 | 57.9% | 39.0% | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | 76.3% | 55.8% | 76.6% | 68.1% | 31.0% | 49.9% | 53.1% | 74.4% | 40.9% | 53.1% | 62.9% | 48.7% | 95.3% | - | - | - | - | - | - | - | - | - | - | - | - | - | 64.3% |
| Claude Opus 4.8 Anthropic | 66.7% | 67.0% | 1281elo | 80.8 | 53.9% | 47.2% | 92.0% | 48.7% | 62.2% | 80.1% | 79.3% | 78.3% | 67.4% | 81.4% | 84.3% | 89.7% | 91.8% | 53.2% | 85.8% | 69.9% | 69.0% | 54.8% | 53.5% | 75.6% | 58.3% | 60.9% | 70.9% | 82.7% | 94.4% | 15.5% | 80.4% | 14.5% | 1835elo | 40.0% | 13.4% | 22.5% | 1890elo | 56.9% | 10.4% | 83.4% | 69.2% | 82.7% | 63.4% |
2 / 2 models
| Attribute | Claude Opus 4.8 Anthropic | Gemini 3.5 Flash Google (Alphabet Inc.) |
|---|---|---|
| Description | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) 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 |
| License | - | proprietary |
| Released | 28 May 2026 | 19 May 2026 |
| Context | 1,000,000 | 1,048,576 |
| Input $/1M | $5.00 | $1.50 |
| Output $/1M | $25.00 | $9.00 |
| Cache read $/1M | $0.500 | $0.150 |
| Cache write $/1M | $6.250 | $0.083 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | 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 Opus 4.8 or Gemini 3.5 Flash better?
- Across the 29 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.8 and Gemini 3.5 Flash compare on GPQA Diamond?
- Claude Opus 4.8 scores 92.0% and Gemini 3.5 Flash scores 92.2% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.8 or Gemini 3.5 Flash?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $25.00 for Claude Opus 4.8 - about 2.8x.
- When were Claude Opus 4.8 and Gemini 3.5 Flash released?
- Claude Opus 4.8 was released 28 May 2026 by Anthropic. Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.).
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