Claude Sonnet 5.5 API Pricing
Claude Sonnet 5.5 by Anthropic costs $2.00 per million input tokens and $10.00 per million output tokens.
Price verified from Anthropic's pricing page.
Rates and limits
- Input / 1M
- $2.00
- Output / 1M
- $10.00
- Cached input / 1M
- $0.20
- Cache write / 1M
- $2.50
- Batch discount
- 50% off
- Context window
- 1M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- June 2026
- Released
- September 2026
Pricing note: Cache write shown is the 5-minute TTL rate; 1-hour cache writes are $4/MTok. US-only inference (inference_geo: "us") is billed at 1.1x.
What Claude Sonnet 5.5 costs per month
Token volume split 3:1 between input and output, with no prompt caching.
| Tokens per month | Input / output | Standard | Batch API |
|---|---|---|---|
| 1M | 750K / 250K | $4.00 | $2.00 |
| 10M | 7.5M / 2.5M | $40.00 | $20.00 |
| 100M | 75M / 25M | $400.00 | $200.00 |
Where to run Claude Sonnet 5.5
Prices above are Anthropic's direct rates. Cloud platforms can charge differently; the cloud platform view compares them.
- Anthropic APIDirect API
- AWS BedrockCloud / platform
- Google Cloud Vertex AICloud / platform
- Azure AI FoundryCloud / platform
- OpenRouterCloud / platform
Claude Sonnet 5.5 pricing FAQ
How much does Claude Sonnet 5.5 cost per million tokens?
Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens, as listed on Anthropic's pricing page on October 5, 2026.
How much does Claude Sonnet 5.5 cost for 10 million tokens a month?
About $40.00 a month, assuming 7.5 million input and 2.5 million output tokens with no prompt caching, or $20.00 through the batch API.
What is the context window of Claude Sonnet 5.5?
Claude Sonnet 5.5 accepts up to 1,000,000 tokens of context and returns up to 128,000 output tokens per request.
Does Claude Sonnet 5.5 support prompt caching?
Yes. Cached input tokens cost $0.20 per million, 90% less than the standard input rate. Writing a prefix to the cache costs $2.50 per million tokens.
Is there a batch discount for Claude Sonnet 5.5?
Yes. Requests sent through the batch API cost 50% less: $1.00 per million input tokens and $5.00 per million output tokens.
Where can I use the Claude Sonnet 5.5 API?
Claude Sonnet 5.5 is available through Anthropic API, AWS Bedrock, Google Cloud Vertex AI, Azure AI Foundry, and OpenRouter.
Compare with other models
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Prices shown as input / output per million tokens. All model prices · Side-by-side comparison