Claude Opus 4.1 vs Claude Opus 4.6 (EU)
Claude Opus 4.6 (EU) is cheaper on output tokens, while Claude Opus 4.6 (EU) offers a larger context window. Choose Claude Opus 4.1 or Claude Opus 4.6 (EU) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 4.1 | Claude Opus 4.6 (EU) |
|---|---|---|
| Provider | Anthropic | Requesty |
| Input / 1M tokens | $15.00 | $5.50 |
| Output / 1M tokens | $75.00 | $27.50 |
| Context window | 200K | 1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Aug 2025 | Feb 2026 |
| LMArena (Chatbot Arena) Elo score | 1419 | — |
| LMArena WebDev Elo score | 1390 | — |
| GPQA Diamond score | 77.3 | — |
| FrontierMath score | 7.2 | — |
| Epoch Capabilities Index score | 144 | — |
FAQ
Is Claude Opus 4.1 or Claude Opus 4.6 (EU) cheaper?
Claude Opus 4.6 (EU) is cheaper on output tokens ($27.50 vs $75.00 per 1M).
Which has the larger context window, Claude Opus 4.1 or Claude Opus 4.6 (EU)?
Claude Opus 4.6 (EU) 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.