Claude 4.5 Opus vs Claude Opus 4.5
Claude Opus 4.5 is cheaper on output tokens. Choose Claude 4.5 Opus or Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude 4.5 Opus | Claude Opus 4.5 |
|---|---|---|
| Provider | AI/ML API | Anthropic |
| Input / 1M tokens | $5.29 | $5.00 |
| Output / 1M tokens | $26.45 | $25.00 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Nov 2025 | Nov 2025 |
| SWE-bench Verified score | 76.8 | 79.2 |
| LiveBench score | — | 76.0 |
| FrontierMath score | — | 20.7 |
| Epoch Capabilities Index score | — | 150 |
| GPQA Diamond score | — | 86.0 |
| SWE-bench Multilingual score | — | 70.7 |
| LMArena (Chatbot Arena) Elo score | — | 1451 |
| LMArena WebDev Elo score | — | 1494 |
FAQ
Is Claude 4.5 Opus or Claude Opus 4.5 cheaper?
Claude Opus 4.5 is cheaper on output tokens ($25.00 vs $26.45 per 1M).
Which has the larger context window, Claude 4.5 Opus or Claude Opus 4.5?
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.