Translation: OpenAI's Inaugural Developer Conference Preview: GPT-4 Unveils New Capabilities, Supporting 32k Context and a New UI Interface. xAI Beta Launch: Elon Musk's xAI Large Model Makes Its Debut, Featuring a Powerful Robot Assistant. New Toolkit: ChatGPT to Usher in the Birth of the New Profession "Agent Engineer," Introducing Custom Chatbot Tools. The Future is Promising: Grok Beta Demonstrates Superb Performance, Supporting 25k Context, Responding Swiftly, and Full of Humor.