Sonnet 4.5 is Anthropic’s advanced large language model, excelling in coding, complex agentic tasks, and real-world computer use. It features hybrid reasoning modes for efficient handling of both simple and complex queries, state-of-the-art performance on coding benchmarks, and advanced memory and context management. The model supports extended autonomous operation, tool orchestration, and is designed for long-running workflows in domains such as software engineering, cybersecurity, and research. Sonnet 4.5 is available via the Claude API and Amazon Bedrock, offering enterprise-grade security and seamless integration for developers.