Having watched the entire launch event for Claude 4 today, I am deeply convinced that large AI models are undergoing a significant paradigm shift, marking the quiet dawn of the AI agent era. Anthropic's next-generation AI large models, Claude Opus 4 and Claude Sonnet 4, have seamlessly succeeded the previously celebrated AI programming tool, Claude 3.7 Sonnet. This transition has left an indelible mark on the global internet community, with numerous netizens expressing their admiration for Claude 4 after testing it, attesting to its capability to swiftly produce 8,000 lines of code.