马斯克急了！宣布 Grok 4 永久免费

Core Viewpoint - Elon Musk announced that the AI model Grok 4 from xAI will be available for free to global users, marking a significant move in the AI industry [2][3]. Group 1: Free Access and Usage Model - Grok 4 is not a trial or limited-time offer; it is genuinely free for users [4]. - Users can choose between an automatic mode, where the system decides when to use Grok 4 based on query complexity, and an expert mode for more control [4]. - There is a limit of 5 uses every 12 hours for free users, after which a subscription is required [6][8]. Group 2: Product Features and Market Impact - Grok 4 was officially launched on July 10, 2023, and is the fourth iteration of xAI's AI models [8]. - The model includes a standard single-agent version and a multi-agent version called Grok 4 Heavy [8]. - Musk claims Grok 4 is the strongest AI model globally, achieving performance levels comparable to a PhD in academic problem-solving [8]. - The model's performance metrics indicate it competes with top models from OpenAI and Anthropic in real-time speed, reasoning ability, and advanced vision [8]. - The free availability of Grok 4 is expected to strengthen its position in the global market and stimulate innovation in AI technology [8].