Claude Opus 4.5 vs Claude Opus 4.8
Head to head on 24 shared benchmarks, with price, context window, and release dates.
Benchmark scores
59evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 61.3% | 1687elo | 73.1 | 20.7% | 86.6% | 30.1% | 58.0% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 45.2% | 83.2% | 68.7% | 36.0% | 45.0% | 49.5% | 74.3% | 47.0% | 20.6% | 89.5% | 91.3% | - | - | - | 16.7% | - | 35.6% | 6.1% | - | - | - | - | - | - | 84.7% | 12.13 | - | 83.8% | 83.5% | - | 87.1% | - | 89.5% | 100.0% | 37.4 | - | 77.5% | 45.3 | 70.7% | 79.2% | - | 61.8 | - | - | - | 64.8% |
| Claude Opus 4.8 Anthropic | 66.7% | 1840elo | 80.8 | 47.2% | 92.0% | 48.7% | 62.2% | 80.1% | 79.3% | 78.3% | 67.4% | 81.4% | 84.3% | 89.7% | 53.2% | 85.8% | 69.9% | 69.0% | 54.8% | 53.5% | 75.6% | 58.3% | 82.7% | 94.4% | - | 15.5% | 80.4% | 14.5% | - | 62.0% | - | - | 1281elo | 40.0% | 53.9% | 13.4% | 22.5% | 1890elo | - | - | 56.9% | - | - | 10.4% | - | 91.8% | - | - | - | 83.4% | - | - | - | - | 69.2% | - | 82.7% | 55.1% | 70.9% | 63.1% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | Claude Opus 4.8 Anthropic |
|---|---|---|
| Description | Claude Opus 4.5 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 | 24 Nov 2025 | 28 May 2026 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | $5.00 | $5.00 |
| Output $/1M | $25.00 | $25.00 |
| Cache read $/1M | $0.500 | $0.500 |
| Cache write $/1M | $6.250 | $6.250 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores |
FAQ
- Is Claude Opus 4.5 or Claude Opus 4.8 better?
- Across the 24 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 22 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.5 and Claude Opus 4.8 compare on GPQA Diamond?
- Claude Opus 4.5 scores 86.6% and Claude Opus 4.8 scores 92.0% on GPQA Diamond.
- When were Claude Opus 4.5 and Claude Opus 4.8 released?
- Claude Opus 4.5 was released 24 Nov 2025 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 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude Opus 4.7 vs Claude Opus 4.830 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsClaude Opus 4.5 vs Gemini 3.1 Pro Preview28 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 Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Opus 4.5 vs GPT-5.428 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude Opus 4.8 vs GPT-5.226 shared evalsClaude Opus 4.8 vs GPT-5.4 Mini26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude Opus 4.8 vs Qwen3.6 Plus25 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude Opus 4.8 vs GPT-5 Mini24 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsClaude Opus 4.5 vs Claude Opus 4.724 shared evalsClaude Opus 4.5 vs Gemini 2.5 Pro24 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Opus 4.5 vs GLM 5.123 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 Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Opus 4.8 vs GLM 4.721 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude Opus 4.8 vs Gemini 2.5 Pro20 shared evalsClaude Opus 4.8 vs GPT-6 Astra19 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude Opus 4.5 vs GPT-4o-mini15 shared evalsClaude Opus 4.5 vs GPT-4.1 Nano15 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsClaude Opus 4.8 vs GPT-4o-mini12 shared evalsClaude Opus 4.8 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 evalsClaude Opus 4.5 vs GPT-6 Astra11 shared evals
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