Anthropic
Anthropic's Claude Opus 4.5: The November 2025 Flagship for Complex Reasoning
Claude Opus 4.5 is Anthropic's November 2025 flagship - top-tier for coding, agents, and complex reasoning with stronger long-horizon reasoning and effort control. Discover how SpinFlow delivers world-class AI with Constitutional AI principles.
November 20, 2025•7 min read