Claude 4.5 Opus vs Claude Opus 5
Claude Opus 5 is cheaper on output tokens, while Claude Opus 5 offers a larger context window. Choose Claude 4.5 Opus or Claude Opus 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 5 |
|---|---|---|
| Provider | AI/ML API | Anthropic |
| Input / 1M tokens | $5.29 | $5.00 |
| Output / 1M tokens | $26.45 | $25.00 |
| Context window | 200K | 1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Nov 2025 | — |
| SWE-bench Verified score | 76.8 | — |
| GPQA Diamond score | — | 93.9 |
| Epoch Capabilities Index score | — | 164 |
| LMArena (Chatbot Arena) Elo score | — | 1509 |
| LMArena WebDev Elo score | — | 1689 |
| LMArena Vision Elo score | — | 1320 |
FAQ
Is Claude 4.5 Opus or Claude Opus 5 cheaper?
Claude Opus 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 5?
Claude Opus 5 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.