Claude Opus 4.8 vs Claude Sonnet 4.6
Head to head on 29 shared benchmarks, with price, context window, and release dates.
Benchmark scores
48evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Sonnet 4.6 Anthropic | 47.6% | 65.3% | 76.0% | 1207elo | 1810elo | 79.9 | 51.0% | 32.4% | 87.5% | 33.6% | 56.6% | 78.4% | 80.0% | 76.1% | 63.9% | 77.7% | 86.5% | 86.4% | 67.7% | 72.1% | 45.0% | 46.6% | 50.1% | 77.1% | 53.0% | 50.6% | 60.6% | 51.5% | 75.7% | 87.1% | 47.2% | - | - | 1.35 | - | - | - | - | - | 92.2% | - | - | - | - | 89.3 | - | - | 76.3 | 64.7% |
| Claude Opus 4.8 Anthropic | 15.5% | 66.7% | 62.0% | 1281elo | 1840elo | 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% | 69.9% | 83.4% | 69.0% | 54.8% | 53.5% | 75.6% | 58.3% | 55.1% | 70.9% | 82.7% | 94.4% | - | - | 80.4% | 14.5% | - | 40.0% | 13.4% | 22.5% | 1890elo | 56.9% | - | 10.4% | 91.8% | 53.2% | 85.8% | - | 69.2% | 82.7% | - | 63.1% |
2 / 2 models
| Attribute | Claude Opus 4.8 Anthropic | Claude Sonnet 4.6 Anthropic |
|---|---|---|
| Description | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is an AI model from Anthropic. | Claude Sonnet 4.6 is an AI model from Anthropic. |
| Family | Claude | Claude |
| Params | - | - |
| Open weights | - | closed |
| License | - | proprietary |
| Released | 28 May 2026 | 17 Feb 2026 |
| Context | 1,000,000 | 1,000,000 |
| Input $/1M | $5.00 | $3.00 |
| Output $/1M | $25.00 | $15.00 |
| Cache read $/1M | $0.500 | $0.300 |
| Cache write $/1M | $6.250 | $3.750 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores |
FAQ
- Is Claude Opus 4.8 or Claude Sonnet 4.6 better?
- Across the 29 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 24 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.8 and Claude Sonnet 4.6 compare on GPQA Diamond?
- Claude Opus 4.8 scores 92.0% and Claude Sonnet 4.6 scores 87.5% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.8 or Claude Sonnet 4.6?
- Claude Sonnet 4.6 is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.8 - about 1.7x.
- When were Claude Opus 4.8 and Claude Sonnet 4.6 released?
- Claude Opus 4.8 was released 28 May 2026 by Anthropic. Claude Sonnet 4.6 was released 17 Feb 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 Sonnet 4.6 vs Gemini 3.1 Pro Preview32 shared evalsClaude Sonnet 4.6 vs GPT-5.530 shared evalsClaude Opus 4.7 vs Claude Opus 4.830 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.6 vs Claude Opus 4.828 shared evalsClaude Opus 4.8 vs GPT-5.428 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsClaude Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.628 shared evalsClaude Sonnet 4.6 vs GPT-5.428 shared evalsClaude Sonnet 4.6 vs GPT-5.4 Mini28 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Opus 4.8 vs GPT-5.226 shared evalsClaude Opus 4.8 vs GPT-5.4 Mini26 shared evalsClaude Sonnet 4.6 vs Qwen3.6 Plus26 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Opus 4.8 vs Qwen3.6 Plus25 shared evalsClaude Sonnet 4.6 vs GLM 5.125 shared evalsClaude Sonnet 4.5 vs Claude Sonnet 4.624 shared evalsClaude Opus 4.8 vs GPT-5 Mini24 shared evalsClaude Sonnet 4.6 vs GPT-5.224 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsClaude Sonnet 4.6 vs GPT-5 Mini23 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Sonnet 4.6 vs DeepSeek V3.223 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 Sonnet 4.6 vs Grok 4.1 Fast22 shared evalsClaude Opus 4.8 vs GLM 4.721 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsClaude Opus 4.8 vs Gemini 2.5 Pro20 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.620 shared evalsClaude Opus 4.8 vs GPT-6 Astra19 shared evalsClaude Sonnet 4.6 vs Gemini 2.5 Pro19 shared evalsClaude Sonnet 4.6 vs GLM 4.719 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude Sonnet 4.6 vs GPT-516 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsClaude Sonnet 4.6 vs GPT-4o14 shared evalsClaude Sonnet 4.6 vs GPT-6 Astra13 shared evalsClaude Sonnet 4.6 vs GPT-4.1 Mini12 shared evalsClaude Opus 4.8 vs GPT-4o-mini12 shared evalsClaude Opus 4.8 vs GPT-4.1 Nano12 shared evalsClaude Sonnet 4.6 vs GPT-4.112 shared evalsClaude Sonnet 4.6 vs GPT-4o-mini12 shared evalsClaude Sonnet 4.6 vs GPT-4.1 Nano12 shared evalsClaude Opus 4.8 vs GPT-4.1 Mini11 shared evalsClaude Opus 4.8 vs GPT-4.111 shared evals
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