Claude 4.5 Opus vs Claude Opus 4.8
Claude Opus 4.8 is cheaper on output tokens, while Claude Opus 4.8 offers a larger context window. Choose Claude 4.5 Opus or Claude Opus 4.8 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude 4.5 Opus | Claude Opus 4.8 |
|---|---|---|
| Provider | AI/ML API | Anthropic |
| Input / 1M tokens | $6.88 | $5.00 |
| Output / 1M tokens | $34.39 | $25.00 |
| Context window | 200K | 1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Nov 2025 | — |
| SWE-bench Verified score | 76.8 | — |
| LMArena (Chatbot Arena) Elo score | — | 1461 |
| LMArena WebDev Elo score | — | 1556 |
| LMArena Vision Elo score | — | 1294 |
| Epoch Capabilities Index score | — | 158 |
| GPQA Diamond score | — | 91.0 |
| FrontierMath score | — | 47.2 |
FAQ
Is Claude 4.5 Opus or Claude Opus 4.8 cheaper?
Claude Opus 4.8 is cheaper on output tokens ($25.00 vs $34.39 per 1M).
Which has the larger context window, Claude 4.5 Opus or Claude Opus 4.8?
Claude Opus 4.8 has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.