深夜炸场，Claude Sonnet 4.5上线，自主编程30小时，网友实测：一次调用重构代码库，新增3000行代码却运行失败

Core Insights - Anthropic has launched the Claude Sonnet 4.5, claiming it to be the "best coding model in the world" with significant improvements over its predecessor, Opus 4 [1][2]. Performance Enhancements - Claude Sonnet 4.5 can autonomously run for over 30 hours on complex multi-step tasks, a substantial increase from the 7 hours of Opus 4 [2]. - In the OSWorld evaluation, Sonnet 4.5 achieved a score of 61.4%, up from 42.2% of Sonnet 4, indicating a marked improvement in computer operation capabilities [4]. - The model outperformed competitors like GPT-5 and Gemini 2.5 Pro in various tests, including Agentic Coding and Agentic Tool Use [6][7]. Safety and Alignment - Claude Sonnet 4.5 is touted as the most "aligned" model to date, having undergone extensive safety training to mitigate issues like "hallucination" and "deception" [9][10]. - It has received an AI Safety Level 3 (ASL-3) rating, equipped with protective measures against dangerous inputs and outputs, particularly in sensitive areas like CBRN [12]. Developer Tools and Features - The update includes a native VS Code plugin for Claude Code, allowing real-time code modification tracking and inline diffs [13]. - A new checkpoint feature enables developers to save code states automatically, facilitating easier exploration and iteration during complex tasks [18]. - Claude API has been enhanced with context editing and memory tools, enabling the handling of longer and more complex tasks [20]. Market Response and Competition - Developers have expressed surprise at the capabilities of Claude Sonnet 4.5, with reports of it autonomously generating complete projects [21][22]. - The competitive landscape is intensifying, with other companies like DeepSeek also releasing new models that significantly reduce inference costs [29][32].