Claude Sonnet 5.5 API pricing
As of October 21, 2026, Anthropic Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens through OpenRouter, with cached input at $0.10 per million.
Claude Sonnet 5.5 benchmarks and specs · Every Anthropic model's price
- Input, per million tokens$2.00
- Output, per million tokens$10.00
- Cached input, per million$0.10
- Context window1M tokens
- Max output128K tokens
- Output speed140 tok/s
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0070 | $7.00 | Yes |
| Repository review | 50K input + 3K output tokens | $0.130 | $130.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.500 | $500.00 | Yes |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | Not computable | Not computable |
Price history
We read this price every day and have since October 15, 2026. It has not changed yet; any change will be listed here with its date.
- October 15, 2026 First recorded: $2.00 input, $10.00 output
Cheaper models as good as Claude Sonnet 5.5
Models within two points of Claude Sonnet 5.5 or above it on the Artificial Analysis Intelligence Index, with a lower output price. Cheapest first.
No model at least as good on this index costs less per output token.
Claude Sonnet 5.5 pricing questions
- How much does Claude Sonnet 5.5 cost per million tokens?
- $2.00 per million input tokens and $10.00 per million output tokens, as listed on OpenRouter on October 21, 2026.
- Does Claude Sonnet 5.5 support prompt caching?
- Yes. OpenRouter lists cached input at $0.10 per million tokens, against $2.00 for uncached input.
- Has the price of Claude Sonnet 5.5 changed?
- Not since we started recording it daily on October 15, 2026.