Claude Opus 5.5
Anthropic🇺🇸
anthropic/claude-opus-5.5Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
Cost rate
4x
Context
1M
Released
Sep 22, 2026
Input
TextImageFile
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
No top-ranked categories found.
Performance
Median latency and throughput measured across recent requests.
Throughput90 tok/s
Latency