Claude Sonnet 5.5
Pricing updated daily · Last refreshed Oct 30, 2026Anthropic model with a 1M-token context window, priced at $2.00 per million input tokens and $10.00 per million output tokens.
At a glance
- Provider
- Anthropic
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Input price
- $2.00 / 1M tokens
- Output price
- $10.00 / 1M tokens
- Input types
- text, image
- Function calling
- Yes
- Released
- September 28, 2026
What it costs
Illustrative request sizes, not measurements of any real product. For your own volumes, use the cost estimator.
| Workload | Tokens in / out | Per request | Per 1,000 requests |
|---|---|---|---|
| Short chat reply | 1,000 / 500 | $0.0070 | $7.00 |
| Question over retrieved documents | 8,000 / 500 | $0.0210 | $21.00 |
| Summarise a long document | 50,000 / 1,500 | $0.1150 | $115.00 |
How it compares
- Input price ($2.00 per 1M tokens) is the 22nd lowest of 30 models in the catalogue.
- Output price ($10.00 per 1M tokens) is the 22nd lowest of 30.
- Context window (1M tokens) is the 12th largest of 30.
- Maximum output (128K tokens) is the 7th largest of 30.
- On blended price it is 50% cheaper than the median Anthropic model in the catalogue.
These are rankings by listed price and size within this catalogue (blended price weights input 3:1 against output), not a measure of output quality.
Cheaper models with the same capabilities
Lower blended price, at least the same context window, and the same input types and function calling.
| Model | Provider | Context | Input $/1M | Output $/1M |
|---|---|---|---|---|
| Llama 4 Scout | Meta | 1.31M | $0.10 | $0.30 |
| Claude Haiku 5.5 | Anthropic | 1M | $0.10 | $0.50 |
| GPT-6 Luna Pro | OpenAI | 1.05M | $0.10 | $0.50 |
More from Anthropic
| Model | Provider | Context | Input $/1M | Output $/1M |
|---|---|---|---|---|
| Claude Haiku 5.5 | Anthropic | 1M | $0.10 | $0.50 |
| Claude Opus 5.5 | Anthropic | 1M | $4.00 | $20.00 |
| Claude Fable 5.1 | Anthropic | 1M | $10.00 | $50.00 |
| Claude Opus 5 | Anthropic | 1M | $5.00 | $25.00 |
Try it with your own text
- Token counter: see how many tokens a prompt uses (exact for OpenAI models, labelled estimates for others).
- Context window visualizer: see how much of this model’s 1M window a prompt fills.
- Model comparison: sort and filter every model, and export to CSV.
Source: OpenRouter’s public model catalogue (anthropic/claude-sonnet-5.5), read once a day. These are the prices OpenRouter charges; a provider’s own list price can differ, so check the provider before committing to a budget.