Claude Opus 5 vs Claude Opus 4.8
Claude Opus 5 vs Claude Opus 4.8: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- Both models cost about the same.
- Both have the same context window.
- Claude Opus 5 is the more recent release (Jul 24, 2026).
- Claude Opus 5 scores higher on independent tests (overall index 162.7 vs 158.3).
| Claude Opus 5 | Claude Opus 4.8 | |
|---|---|---|
| Company | Anthropic | Anthropic |
| Released | Jul 24, 2026 ● | May 27, 2026 |
| Overall index | 162.7 ● | 158.3 |
| GPQA Diamond | 93.9% ● | 91.0% |
| AIME math | 98.9% ● | 98.3% |
| FrontierMath | 85.6% ● | 80.0% |
| SimpleQA Verified | 59.9% ● | 53.0% |
| Input (per 1M tokens) | $5 | $5 |
| Output (per 1M tokens) | $25 | $25 |
| Cost for 1M input + 1M output tokens | $30.00 | $30.00 |
| Providers | 11 | 11 |
| Context | 1M | 1M |
| Max output | 128K | 128K |
| Inputs | Text, Image, Files | Text, Image, Files |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | — |