Claude Sonnet 4.5 (Global)

Claude Sonnet 4.5 is designed as a specialized model for complex logic, chain-of-thought processing, and high-level reasoning. It is positioned as a premier tool for software development, with demonstrated strength in coding benchmarks like SWE-Bench Verified. Beyond its core programming capabilities, the model is built to function as a robust engine for complex agents, enabling them to interact with computer environments and manage intricate tasks that require sustained focus and logical precision.

The model represents a significant evolution in the Sonnet line, delivering enhanced performance while maintaining a cost-neutral structure for developers. It integrates advanced features such as native tool calling and support for extended context management, which allows agents to handle larger, more complex datasets over time. By providing the same foundational building blocks used in internal tools like Claude Code, the model offers a practical, scalable solution for businesses and developers looking to automate workflows and improve productivity in technical environments.