Claude Sonnet 4.5 API pricing variable pricing
Claude Sonnet 4.5 by Anthropic costs $3.00 per 1M input tokens and $15.00 per 1M output tokens (1M in + 1M out = $18.00).
- API model id
claude-sonnet-4-5- Input / 1M
- $3.00
- Output / 1M
- $15.00
- Cached input / 1M
- $0.30
- Context window
- —
- Notes
- Cached = cache hit price. 5m cache writes cost 1.25x input.
- Source
- https://docs.anthropic.com/en/docs/about-claude/pricing
- Provider type
- First-party (HQ: US)
- Regions
- Global, US
- EU data residency
- no — Claude API is global by default; the only first-party residency option documented is US-only inference (inference_geo: "us", 1.1x price).
- Last verified
- 2026-10-15
Variable pricing
The effective price of this model depends on the request. Figures above are the base (short-context / peak) tier.
- Depends on caching: Cache writes cost extra: 5-min write $3.75, 1-hour write $6 per 1M; cache hits $0.3.
Cost estimate
| Provider | Model | Cost |
|---|---|---|
| Anthropic | Claude Sonnet 4.5 | $6.75 |
Uses standard list prices (no caching, batch or off-peak discounts). € and CHF rows are priced in that currency by the provider and not converted, so compare them with care.
Other Anthropic models
- Claude Fable 5.1: $10.00 / $50.00
- Claude Fable 5: $10.00 / $50.00
- Claude Opus 5.5: $4.00 / $20.00
- Claude Opus 5: $5.00 / $25.00
- Claude Opus 4.8: $5.00 / $25.00
- Claude Opus 4.7: $5.00 / $25.00
- Claude Opus 4.6: $5.00 / $25.00
- Claude Sonnet 5.5: $2.00 / $10.00