Claude Opus 5.5
AnthropicUpdated October 2026. Claude Opus 5.5 by Anthropic: $4.00/M cache-miss input, $20.00/M output tokens. Cached input: $0.2/M. Explicit cache writes: $5.00/M. 1.0M context, 128K max output. Vision & Function Calling. Free calculator + compare 40+ models.
Input Price
$4.00
cache miss / 1M tokens
Cached Input
$0.2
per 1M tokens
Output Price
$20.00
per 1M tokens
Context Window
1.0M
tokens
Specifications
| Provider | Anthropic |
| Model ID | claude-opus-5-5 |
| Input Price | $4.00 / 1M cache-miss tokens |
| Cached Input Price | $0.2 / 1M tokens |
| Explicit Cache Write Price | $5.00 / 1M tokens |
| Output Price | $20.00 / 1M tokens |
| Context Window | 1.0M tokens |
| Max Output | 128K tokens |
| Capabilities | textvisionfunction_callingstructured_output |
| Release Date | 2026-09-22 |
| Pricing Source | Official Anthropic pricing |
| Price Verified | 2026-10-02 · Sonnet 5.5 launched at $2/$10 with $0.20/M cache reads and $2.50/M 5-minute cache writes. Fable 5.1 and Opus 5.5 rates are unchanged; Sonnet 5 retains its permanent $2/$10 standard rate. |
| Notes | Current default Claude model for long-running agentic coding and knowledge work. Adaptive thinking is always on. The listed cache-write price is for a 5-minute TTL; 1-hour writes cost $8/M, Batch input/output costs $2/$10, and Fast mode costs $8/$40. |
Monthly Cost Estimates
Estimated monthly costs based on different daily usage levels (assuming 50% input / 50% output split). Input estimates use cache-miss pricing, so cache-heavy workloads can be lower.
| Daily Tokens | Monthly Cost | Annual Cost |
|---|---|---|
| 10K | $3.60 | $43.20 |
| 50K | $18.00 | $216.00 |
| 100K | $36.00 | $432.00 |
| 500K | $180.00 | $2160.00 |
| 1.0M | $360.00 | $4320.00 |
About Claude Opus 5.5
Claude Opus 5.5 is a large language model by Anthropic. It features a 1.0M token context window with up to 128K tokens of output per request. The model supports 4 capabilities: text, vision, function_calling, structured_output.
At $4.00 per million cache-miss input tokens and $20.00 per million output tokens, Claude Opus 5.5 is positioned as a mid-range option in the Anthropic lineup. Repeated prefix input can be charged at $0.2 per million cached tokens. Use our Token Counter to estimate how many tokens your prompts use, and our Pricing Calculator to compare costs across all models.
Claude Opus 5.5 Key Details
- Pricing: $4.00/M cache-miss input tokens, $0.2/M cached input tokens, $5.00/M explicit cache writes, $20.00/M output tokens
- Context window: 1.0M tokens — one of the largest available
- Max output: 128K tokens per response
- Capabilities: text, vision, function_calling, structured_output
- Highlights: Current default Claude model for long-running agentic coding and knowledge work. Adaptive thinking is always on. The listed cache-write price is for a 5-minute TTL; 1-hour writes cost $8/M, Batch input/output costs $2/$10, and Fast mode costs $8/$40.
- Released: 2026-09-22
Other Anthropic Models
Similar Price Range
Related Tools
FAQ
How much does Claude Opus 5.5 cost?
Claude Opus 5.5 costs $4.00 per million cache-miss input tokens and $20.00 per million output tokens. Cached input costs $0.2 per million tokens. For a typical workload of 100K input tokens/day and 50K output tokens/day, expect approximately $42.00/month before cache-hit savings.
What is Claude Opus 5.5's context window?
Claude Opus 5.5 supports a context window of 1.0M tokens. This means your combined input prompt and output response can be up to 1.0M tokens. The maximum output per response is 128K tokens.
Is Claude Opus 5.5 good for my use case?
Claude Opus 5.5 supports text, vision, function_calling, structured_output. As a mid-range model, it balances capability and cost for most production use cases. Use our Pricing Calculator to compare with alternatives.