Anthropic
Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
claude-opus-5.5Pricing
~93%- Input
- $0.263855 / 1,000,000 tokens
- Output
- $1.319275 / 1,000,000 tokens
- Cache read
- $0.013193 / 1,000,000 tokens
- Cache write
- $0.329819 / 1,000,000 tokens
Discount history
Model details
- Input
- text, image, file
- Output
- text
- Context window
- 1,000,000 tokens
- Maximum output
- 128,000 tokens
- Availability
- $8.8KUncapped capacity
- Updated
- 11/8/2026, 3:58:06 AM UTC
Capacity is reserved when your request is accepted.
Capabilities
ChatStreamingWeb searchVisionTool callingReasoningJSON mode
Supported parameters
include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity