Anthropic Unveils Claude Sonnet 4.5 with Breakthrough AI Capabilities
Anthropic's latest AI model, Claude Sonnet 4.5, marks a significant leap in coding proficiency and agentic task management. The upgrade delivers enhanced reasoning, mathematical precision, and extended operational focus—capable of sustaining complex tasks for over 30 hours. OSWorld benchmarks confirm its dominance in real-world computer applications, outpacing its predecessor.
The release introduces developer-centric features: checkpoint-based progress saving in Claude Code, a native VS Code extension, and context editing for API-driven agent operations. Anthropic now opens its infrastructure to third-party developers through the Claude Agent SDK, mirroring the tools powering its flagship coding assistant.