Claude Sonnet 5.5 (AU) vs GPT-5.6 Terra
Claude Sonnet 5.5 (AU) is cheaper on output tokens, while GPT-5.6 Terra offers a larger context window. Choose Claude Sonnet 5.5 (AU) or GPT-5.6 Terra based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Sonnet 5.5 (AU) | GPT-5.6 Terra |
|---|---|---|
| Provider | Amazon Bedrock | OpenAI |
| Input / 1M tokens | $2.20 | $2.00 |
| Output / 1M tokens | $11.00 | $12.00 |
| Context window | 1M | 1.1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Sep 2026 | — |
| LMArena (Chatbot Arena) Elo score | — | 1448 |
| GPQA Diamond score | — | 93.3 |
| Epoch Capabilities Index score | — | 160 |
| LMArena WebDev Elo score | — | 1522 |
| LMArena Vision Elo score | — | 1271 |
FAQ
Is Claude Sonnet 5.5 (AU) or GPT-5.6 Terra cheaper?
Claude Sonnet 5.5 (AU) is cheaper on output tokens ($11.00 vs $12.00 per 1M).
Which has the larger context window, Claude Sonnet 5.5 (AU) or GPT-5.6 Terra?
GPT-5.6 Terra has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.