AmazonReasoning modelClaude Sonnet 4.5 (AU)
Claude Sonnet 4.5 (AU) is an Amazon proprietary reasoning model, released 29 Sept 2025. It is not yet ranked: no independent benchmark results so far, only pricing and metadata. At $6.00 per million tokens blended it is among the most expensive ranked models.
- Blended price
- $6.00/M
- $3.00 in · $15.00 out
- Output speed
- –
- First answer
- –
- Context
- 200k
- Released
- 29 Sept 2025
Versions
Amazon has shipped 2 models under this name. Each is ranked on its own results; a newer version often has fewer results so far, which holds its index nearer the average until more arrive.
| Model | Released | Index | Rank |
|---|---|---|---|
| Claude Sonnet 5 (AU) | 30 Jun 2026 | – | – |
| Claude Sonnet 4.5 (AU)this page | 29 Sept 2025 | – | – |
No independent quality benchmark results yet — only pricing and metadata.
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache at $0.300 per 1M. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0057 | $0.0049 | – |
| Summarise a 30-page report | 12,000 / 600 | $0.045 | $0.021 | – |
| Code edit | 6,000 / 1,500 | $0.041 | $0.028 | – |
| Agentic coding session | 60,000 / 4,000 | $0.240 | $0.118 | – |
| Structured extraction | 2,000 / 200 | $0.0090 | $0.0050 | – |
See also
Data as of 13 Sept 2026. Compare with another model.
Cite as: BenchLeader, “Claude Sonnet 4.5 (AU): benchmarks, pricing, speed and rank”, https://www.benchleader.com/models/au-anthropic-claude-sonnet-4-5, data as of 13 Sept 2026.