Claude 3.5 Sonnet is a next-generation large language model from Anthropic focused on higher intelligence, speed, and safety. Sonnet outperforms competitor models and Anthropic's prior Claude 3 Opus on a wide range of evaluations while operating at roughly twice the inference speed, enabling lower-latency interactions. The model is tuned for complex tasks — coding, longform writing, analysis, and multimodal inputs including visual processing — and includes architecture and training choices intended to reduce hallucinations and improve alignment with user intent. Sonnet has been released as a production model snapshot (October 22, 2024) and is positioned for use in assisted workflows, developer integrations, and productified conversational agents.