刚刚，Claude Sonnet 4.5重磅发布，编程新王降临

Core Insights - Anthropic has officially released Claude Sonnet 4.5, which is defined as the world's strongest code model, showcasing significant breakthroughs in agent construction, computer usage, reasoning, and mathematical capabilities [2][3]. Performance and Benchmarking - Sonnet 4.5 achieved top performance in various authoritative tests, including a 77.2% score in SWE-bench Verified for real software coding capabilities, and a 61.4% score in OSWorld for simulating real computer tasks, up from 42.2% in the previous version [4][10][13]. - The model demonstrated a 100% success rate in high school math competitions and improved performance in graduate-level reasoning and multilingual Q&A [4][10]. New Features and Product Upgrades - The release includes significant updates across the Claude product line, such as the introduction of "Checkpoints" in Claude Code, allowing users to save progress and revert to earlier states [6]. - Claude API has added context editing features and memory tools, enabling agents to run longer and handle more complex tasks [6][34]. Developer Resources - A new core resource, Claude Agent SDK, has been introduced, providing foundational capabilities for building intelligent agents [8][9]. - The SDK is designed to support a wide range of applications beyond coding, facilitating the development of autonomous agents for complex tasks [32]. Safety and Alignment - Sonnet 4.5 is noted for its improved alignment and safety features, significantly reducing harmful behaviors and enhancing defenses against prompt injection attacks [28][31]. - The model is released under the AI Safety Level 3 framework, incorporating various protective measures, including classifiers for sensitive content [31]. Pricing and Access - The pricing for Sonnet 4.5 remains consistent with Sonnet 4, set at $3 per million tokens for input and $15 per million tokens for output [35]. - The model is accessible through multiple channels, including Claude API, Amazon Bedrock, and Google Cloud Vertex AI [37]. Industry Impact - Claude Sonnet 4.5 is positioned as a powerful tool for developers and professionals in fields such as finance, medicine, and research, marking a significant advancement in AI capabilities and safety [40].