Claude Opus 4.8 vs Claude Opus 5
Both have similar output pricing. Choose Claude Opus 4.8 or Claude Opus 5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 4.8 | Claude Opus 5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input / 1M tokens | $5.00 | $5.00 |
| Output / 1M tokens | $25.00 | $25.00 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | — | — |
| Released | — | — |
| GPQA Diamond score | 91.0 | 93.9 |
| FrontierMath score | 47.2 | — |
| Epoch Capabilities Index score | 160 | 164 |
| LMArena (Chatbot Arena) Elo score | 1461 | 1508 |
| LMArena WebDev Elo score | 1556 | 1691 |
| LMArena Vision Elo score | 1294 | 1320 |
FAQ
Is Claude Opus 4.8 or Claude Opus 5 cheaper?
Claude Opus 4.8 and Claude Opus 5 have comparable output pricing.
Which has the larger context window, Claude Opus 4.8 or Claude Opus 5?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.