Claude Opus 5.5 Pricing
FlagshipAnthropic · 1M tokens context
Claude Opus 5.5 from Anthropic costs $4.00 per 1 million input tokens and $20.00 per 1 million output tokens as of September 2026 (live OpenRouter data). The model supports a 1,000,000-token context window (approximately 750,000 words) with a 128K-token maximum output. A typical 1,000-token request costs $0.0040 in input charges; a 10,000-token request costs $0.0400.
| Input price | $4.00 / 1M tokens |
|---|---|
| Output price | $20.00 / 1M tokens |
| Output / input ratio | 5.0× |
| Context window | 1,000,000 tokens (~750,000 words) |
| Maximum output | 128,000 tokens |
| Cost per 1K tokens (input) | $0.0040 |
| Tier | Flagship |
| Last verified |
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
Input Price
$4.00
per 1 million tokens
Output Price
$20.00
per 1 million tokens
Context Window
1M tokens
max 128K output
Cost Examples
| Request Type | Tokens | Input Cost | Output Cost |
|---|---|---|---|
| 1,000 word article | 1,333 | $0.00533 | $0.008 |
| 10-page document (2,500 words) | 3,333 | $0.0133 | $0.02 |
| 1,000 lines of code | 5,000 | $0.02 | $0.03 |
| 100K token document | 100,000 | $0.40 | $0.60 |
Output cost estimated at 30% of input token count. Use the calculator for exact figures.
Strengths
- ✓Massive 1M-token context window
- ✓Frontier-class quality on complex tasks
- ✓Multimodal: understands images as well as text
Limitations
- –Quality and availability can vary by hosting provider
- –Quality and availability can vary by hosting provider
Best Use Cases
Calculate Claude Opus 5.5 Costs
Use the TokenRate calculator to convert any budget, token count, or text into exact Claude Opus 5.5 costs — and compare across all models.
Open Calculator →Claude Opus 5.5 — FAQ
Related Models
Related Guides