Opus 4.5

Anthropic's frontier-grade LLM: The world's best model for complex coding, agentic workflows, and high-stakes enterprise tasks.

Opus 4.5 is Anthropic’s most intelligent model, setting the new benchmark for advanced AI capability. It dominates software engineering, achieving an 80.9% score on SWE-Bench Verified, and even outscored every human candidate on Anthropic’s internal engineering test. Developers gain critical cost control with the new 'effort' parameter (Low, Medium, High) and significantly reduced API pricing ($5/million input tokens, $25/million output tokens). This model is engineered for long-horizon, autonomous tasks, delivering professional-grade output for deep research and complex enterprise automation.

https://www.anthropic.com/product/claude-opus-4-5