Claude Sonnet 4.5 API Pricing
Anthropic · Frontier · Proprietary · released 2025-09. Prices in USD per 1 million tokens. Data snapshot: 2026-08-14.
- Input: $3.00 per 1M tokens
- Output: $15.00 per 1M tokens
- Batch API (input/output): $1.50 / $7.50
- Prompt-cache read: $0.30
- Context window: 1M
- Arena ELO: 1438 (as of 2026-08-13)
- Available on: Direct API, AWS Bedrock, Google Vertex, OpenRouter (curated by hand — verify with the provider)
Cost per request by business use case
List price vs optimized (prompt caching on the cached input share, batch API for async workloads — only where the provider publishes those rates).
| Use case | Tokens (in/out) | Cost/req (list) | Cost/req (optimized) | Monthly @100K req |
|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $0.012 | $0.0096 | $957 |
| Knowledge Q&A | 2,000 / 800 | $0.018 | $0.014 | $1.4K |
| Meeting Summary | 10,000 / 1,200 | $0.048 | $0.023 | $2.3K |
| Marketing Content | 2,500 / 1,800 | $0.035 | $0.033 | $3.3K |
| Coding Task | 3,000 / 2,000 | $0.039 | $0.035 | $3.5K |
| Invoice Processing | 1,500 / 600 | $0.013 | $0.0062 | $621 |
| Call Summary | 2,000 / 700 | $0.017 | $0.0080 | $801 |
| Agent Workflow | 6,000 / 3,000 | $0.063 | $0.052 | $5.2K |
These are list prices — real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.