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 4.8 Anthropic | 66.7% | 1835elo | 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% | - | 67.0% | - | - | 1281elo | 40.0% | 53.9% | 13.4% | 22.5% | 1890elo | - | - | 56.9% | - | - | 10.4% | - | 91.8% | - | - | - | 83.4% | - | - | - | - | 69.2% | - | 82.7% | 60.9% | 70.9% | 63.4% |
| Claude Opus 4.5 Anthropic | 61.3% | 1683elo | 73.1 | 20.7% | 81.0% | 13.2% | 43.0% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 45.2% | 83.2% | 68.7% | 36.0% | 45.0% | 47.0% | 74.3% | 40.9% | 20.6% | 86.3% | 62.7% | - | - | - | 16.7% | - | 35.6% | 6.1% | - | - | - | - | - | - | 84.7% | 12.13 | - | 83.8% | 83.5% | - | 73.8% | - | 88.9% | 100.0% | 37.4 | - | 77.5% | 45.3 | 70.7% | 79.2% | - | 61.8 | - | - | - | 62.2% |
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 81.0% 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.
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