Claude Opus 4.5
Anthropic's most powerful frontier model with exceptional reasoning, coding, and scientific capabilities
Claude Opus 4.5
Anthropic • November 2025
Training Data
Up to May 2025
Claude Opus 4.5
November 2025
Parameters
~600 billion
Training Method
Advanced Constitutional AI
Context Window
200,000 tokens
Knowledge Cutoff
May 2025
Key Features
Most Powerful Frontier Model • Exceptional Reasoning • Scientific Excellence • Superior Coding
Capabilities
Reasoning: Maximum
Coding: Outstanding
Science: Outstanding
Biology: Excellent
What's New in This Version
Most capable model for computational biology, complex reasoning, and understanding scientific figures
Anthropic's most powerful frontier model with exceptional reasoning, coding, and scientific capabilities
What's New in This Version
Most capable model for computational biology, complex reasoning, and understanding scientific figures
Technical Specifications
Key Features
Capabilities
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