Introducing Claude Sonnet 5
Summary
Anthropic announces Claude Sonnet 5, a more agentic AI model capable of planning, using tools (browsers and terminals), and operating autonomously at a lower price. The release highlights improved reasoning, coding, and knowledge work, with safety gains over Sonnet 4.6 but limited cybersecurity capabilities versus Opus 4.8, plus new cyber safeguards and pricing details for developers. Availability spans all plans with introductory pricing through Aug 31, 2026.