Anthropic API
Claude Opus 5.5 API Pricing 2026 — Cost per 1 Million Tokens
Current Claude Opus 5.5 API pricing from Anthropic per 1 million tokens, including input, output and cached-token rates when available.
| Model | Rate | Price / 1M tokens |
|---|---|---|
| Claude Opus 5.5 Anthropic's latest Opus model for long-running agents, coding and professional work. Available on the Claude Platform as claude-opus-5-5; Fast mode is priced separately. Standard pricing per million tokens is $4 input, $5 for a 5-minute cache write, $8 for a 1-hour cache write, $0.20 cache reads and $20 output. Fast mode costs $8 input and $40 output. | Input | $4 |
| Claude Opus 5.5 | Cache write — 5 minute TTL | $5 |
| Claude Opus 5.5 | Cache write — 1 hour TTL | $8 |
| Claude Opus 5.5 | Cache read | $0.2 |
| Claude Opus 5.5 | Output | $20 |
| Claude Opus 5.5 | Input — Fast mode | $8 |
| Claude Opus 5.5 | Output — Fast mode | $40 |
How API token cost is calculated
Multiply the number of tokens by the provider rate, then divide by 1,000,000.
cost = tokens × price per 1M ÷ 1,000,000
Example: 250,000 input tokens at $2 / 1M = $0.50.