Claude Sonnet 4.5: A Hybrid Reasoning Model for Advanced Agents and Coding
Anthropic Claude Sonnet 4.5 blends exceptional intelligence, long-horizon reasoning, and reliable tool usage to power complex agents and end-to-end coding.
Trusted by users from 10,000+ companies
Claude Sonnet 4.5 is reliable and balances control and accessibility
Claude Sonnet 4.5 helps organizations adopt advanced AI with confidence while maintaining clear oversight.
Enterprise-grade alignment
Built with ASL-3 protections and improved behavioral guardrails, minimizing sycophancy, deception, and unsafe outputs for dependable deployment.
Prompt-injection resilience
Hardened against adversarial prompts and web-borne manipulations, maintaining task objectives and safeguarding tools, credentials, and sensitive organizational context.
Stateful project memory
Optional memory incorporates important facts beyond the context window, enabling continuity across sessions and smoother long-horizon, multi-phase initiatives.
