Claude 3.5 Sonnet vs Claude Opus 4.8
Head to head on 13 shared benchmarks, with price, context window, and release dates.
Benchmark scores
59evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.8 Anthropic | 66.7% | 1840elo | 80.8 | 47.2% | 91.0% | 48.7% | 80.1% | 79.3% | 67.4% | 81.4% | 69.9% | 53.5% | 75.6% | - | - | - | - | - | 15.5% | 80.4% | 14.5% | 61.0% | - | 1268elo | 40.0% | 53.9% | 13.4% | 22.5% | 1890elo | - | 56.9% | 62.2% | - | 10.4% | 78.3% | 84.3% | 89.7% | - | - | 91.8% | 53.2% | 85.8% | - | 83.4% | 69.0% | - | 54.8% | - | - | - | 69.2% | 82.7% | 58.3% | - | 55.1% | 70.9% | 82.7% | - | 94.4% | 63.0% |
| Claude 3.5 Sonnet Anthropic | 53.6% | 1451elo | 58.4 | 2.1% | 55.3% | 4.1% | 63.7% | 65.6% | 69.2% | 56.4% | 64.1% | 36.6% | 70.2% | 51.6% | 15.7% | 3.3% | 52.4% | 24.2% | - | - | - | - | 28.0% | - | - | - | - | - | - | 96.4 | - | - | 0.0% | - | - | - | - | 38.1% | 77.1% | - | - | - | 77.2% | - | - | 0.0% | - | 51.3% | 25.3% | 63.4% | - | - | - | 0.98 | - | - | - | 62.6% | - | 42.7% |
2 / 2 models
| Attribute | Claude 3.5 Sonnet Anthropic | Claude Opus 4.8 Anthropic |
|---|---|---|
| Description | Claude Sonnet 3.5 is an AI model from Anthropic. | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is an AI model from Anthropic. |
| Family | Claude | Claude |
| Params | - | - |
| Open weights | closed | - |
| License | proprietary | - |
| Released | 22 Oct 2024 | 28 May 2026 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | $3.00 | $5.00 |
| Output $/1M | $15.00 | $25.00 |
| Cache read $/1M | - | $0.500 |
| Cache write $/1M | - | $6.250 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores | MortgageTax64.1% Traveling Salesman0.98 (3 samples) SWE-bench Verified63.4% (SWE-bench) SWE-bench Lite51.3% (SWE-bench) SWE-bench Multimodal25.3% (SWE-bench) |
FAQ
- Is Claude 3.5 Sonnet or Claude Opus 4.8 better?
- Across the 13 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 12 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 3.5 Sonnet and Claude Opus 4.8 compare on GPQA Diamond?
- Claude 3.5 Sonnet scores 55.3% and Claude Opus 4.8 scores 91.0% on GPQA Diamond.
- Which is cheaper, Claude 3.5 Sonnet or Claude Opus 4.8?
- Claude 3.5 Sonnet is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.8 - about 1.7x.
- When were Claude 3.5 Sonnet and Claude Opus 4.8 released?
- Claude 3.5 Sonnet was released 22 Oct 2024 by Anthropic. Claude Opus 4.8 was released 28 May 2026 by Anthropic.
Other head-to-heads
56Claude Opus 4.8 vs GPT-5.541 shared evalsClaude Fable 5 vs Claude Opus 4.840 shared evalsClaude Opus 4.8 vs Gemini 3.1 Pro Preview38 shared evalsClaude Opus 4.7 vs Claude Opus 4.830 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.8 vs GPT-5.428 shared evalsClaude Opus 4.6 vs Claude Opus 4.828 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Opus 4.8 vs GPT-5.226 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Opus 4.8 vs Qwen3.6 Plus25 shared evalsClaude Opus 4.8 vs GPT-5 Mini24 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude Opus 4.8 vs DeepSeek V3.222 shared evalsClaude 3.5 Sonnet vs GPT-4o22 shared evalsClaude Opus 4.8 vs GLM 4.721 shared evalsClaude 3.5 Sonnet vs Claude 4 Sonnet21 shared evalsClaude 3.5 Sonnet vs Gemini 2.5 Pro21 shared evalsClaude Opus 4.8 vs Gemini 2.5 Pro20 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.519 shared evalsClaude 3.5 Sonnet vs GPT-5 Mini19 shared evalsClaude Opus 4.8 vs GPT-6 Astra19 shared evalsClaude 3.5 Sonnet vs GPT-4o-mini19 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude 3.5 Sonnet vs GPT-4.118 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Mini17 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-5 Nano17 shared evalsClaude 3.5 Sonnet vs GPT-5.217 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.517 shared evalsClaude 3.5 Sonnet vs DeepSeek V3.217 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Nano16 shared evalsClaude 3.5 Sonnet vs gpt-oss-120b16 shared evalsClaude 3.5 Sonnet vs Kimi K2.515 shared evalsClaude 3.5 Sonnet vs Grok 4.1 Fast15 shared evalsClaude 3.5 Sonnet vs GLM 4.715 shared evalsClaude 3.5 Sonnet vs GPT-5.514 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.614 shared evalsClaude 3.5 Sonnet vs Gemini 3.1 Pro Preview13 shared evalsClaude 3.5 Sonnet vs GPT-5.413 shared evalsClaude 3.5 Sonnet vs GLM 5.113 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.613 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.713 shared evalsClaude Opus 4.8 vs GPT-4o-mini12 shared evalsClaude Opus 4.8 vs GPT-4.1 Nano12 shared evalsClaude 3.5 Sonnet vs Claude Fable 512 shared evalsClaude Opus 4.8 vs GPT-4.1 Mini11 shared evalsClaude Opus 4.8 vs GPT-4.111 shared evalsClaude 3.5 Sonnet vs Qwen3.6 Plus11 shared evalsClaude 3.5 Sonnet vs GPT-6 Astra6 shared evals
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