Claude Opus 4 vs Claude Opus 4.1
Both have similar output pricing. Choose Claude Opus 4 or Claude Opus 4.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 4 | Claude Opus 4.1 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input / 1M tokens | $15.00 | $15.00 |
| Output / 1M tokens | $75.00 | $75.00 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | May 2025 | Aug 2025 |
| Aider Polyglot score | 72.0 | — |
| LMArena (Chatbot Arena) Elo score | 1377 | 1419 |
| LMArena Vision Elo score | 1192 | — |
| GPQA Diamond score | 76.3 | 77.3 |
| FrontierMath score | 4.5 | 7.2 |
| Epoch Capabilities Index score | 143 | 144 |
| LMArena WebDev Elo score | — | 1390 |
FAQ
Is Claude Opus 4 or Claude Opus 4.1 cheaper?
Claude Opus 4 and Claude Opus 4.1 have comparable output pricing.
Which has the larger context window, Claude Opus 4 or Claude Opus 4.1?
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.