Claude Sonnet 4.5 (AU) vs Claude Opus 4.1
Claude Sonnet 4.5 (AU) is cheaper on output tokens. Choose Claude Sonnet 4.5 (AU) or Claude Opus 4.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Sonnet 4.5 (AU) | Claude Opus 4.1 |
|---|---|---|
| Provider | Amazon Bedrock | Anthropic |
| Input / 1M tokens | $3.30 | $15.00 |
| Output / 1M tokens | $16.50 | $75.00 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2025 | Aug 2025 |
| 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 Sonnet 4.5 (AU) or Claude Opus 4.1 cheaper?
Claude Sonnet 4.5 (AU) is cheaper on output tokens ($16.50 vs $75.00 per 1M).
Which has the larger context window, Claude Sonnet 4.5 (AU) 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.