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Elon Musk\u2019s AI company, xAI, late on Wednesday released its latest flagship AI model, Grok 4, and unveiled a new $300-per-month AI subscription plan, SuperGrok Heavy.<\/p>\n
Grok<\/a> is xAI\u2019s answer to models like OpenAI\u2019s\u00a0ChatGPT<\/a>\u00a0and Google\u2019s\u00a0Gemini<\/a>, and can analyze images and respond to questions. In recent months, Grok has become more deeply integrated into Musk\u2019s social network, X, which was recently acquired by xAI<\/a> \u2014 however, that\u2019s also put Grok\u2019s misbehavior front and center for millions of users<\/a>.<\/p>\n The expectations are high for Grok 4. The latest AI model from xAI will be stacked up against OpenAI\u2019s forthcoming AI model, GPT-5,<\/a> which is expected to launch later this summer.<\/p>\n \u201cWith respect to academic questions, Grok 4 is better than PhD level in every subject, no exceptions,\u201d said Elon Musk during a livestream Wednesday night. \u201cAt times, it may lack common sense, and it has not yet invented new technologies or discovered new physics, but that is just a matter of time.\u201d<\/p>\n The launch of Grok 4 comes amid a tumultuous week for Elon Musk\u2019s companies. Earlier on Wednesday, Linda Yaccarino stepped down<\/a> from her role as the CEO of X after roughly two years with the company. X has yet to announce her successor.<\/p>\n Yaccarino\u2019s departure comes just days after Grok\u2019s official, automated X account responded to users with antisemitic comments criticizing Hollywood\u2019s \u201cJewish executives\u201d and praising Hitler.<\/a> xAI had to briefly limit Grok\u2019s account and delete the offensive posts. In response to the incident, xAI appeared to have removed a recently added section from Grok\u2019s public system prompt<\/a>, a list of instructions for the AI chatbot to follow, that told it not to shy away from making \u201cpolitically incorrect\u201d claims.<\/p>\n Musk and xAI\u2019s leaders largely avoided discussing the incident, instead focusing on Grok 4\u2019s performance and capabilities.<\/p>\n xAI launched two models on Wednesday: Grok 4 and Grok 4 Heavy \u2014 the latter being the company\u2019s \u201cmulti-agent version\u201d that offers increased performance.<\/p>\n xAI claims that Grok 4 shows frontier level performance on several benchmarks, including Humanity\u2019s Last Exam\u2014 a challenging test measuring AI\u2019s ability to answer thousands of crowdsourced questions on subjects like math, humanities, and natural science. According to xAI, Grok 4 scored 25.4% on Humanity\u2019s Last Exam without \u201ctools\u201d, outperforming Google\u2019s Gemini 2.5 Pro, which scored 21.6%, and OpenAI\u2019s o3 (high), which scored 21%. <\/p>\n xAI claims that Grok 4 Heavy, with \u201ctools,\u201d was able to achieve a score of 44.4%, outperforming Gemini 2.5 Pro with tools, which scored 26.9%.<\/p>\n The nonprofit Arc Prize says that Grok achieves a new state-of-the-art score<\/a> on its ARC-AGI-2 test \u2014 another difficult benchmark that consists of puzzle-like problems where an AI has to identify visual patterns \u2014 scoring 16.2%. That\u2019s nearly twice the score of the next best commercial AI model, Claude Opus 4.<\/p>\n Alongside Grok 4 and Grok 4 Heavy, xAI launched its most expensive AI subscription plan yet, a $300-per-month subscription called SuperGrok Heavy. Subscribers to the plan will get an early preview to Grok 4 Heavy, as well as early access to new features. The plan is similar to ultra-premium tiers offered by OpenAI, Google, and Anthropic \u2014 however, xAI now offers the most expensive subscription among major AI providers.<\/p>\n SuperGrok Heavy subscribers may get early access to some new products xAI plans to launch in the coming months. The company said Wednesday that an AI coding model is coming in August, a multi-modal agent in September, and a video generation model in October. <\/p>\n The launch of Grok 4 comes after a tumultuous week for Elon Musk\u2019s social media and AI companies. <\/p>\n Earlier on Wednesday, Linda Yaccarino stepped down from her role as the CEO of X after roughly two years with the company. X has yet to announce her successor.<\/p>\n Yaccarino\u2019s departure comes just days after an automated X account connected to Grok responded to users with antisemitic comments criticizing Hollywood\u2019s \u201cJewish executives\u201d and praising Hitler.<\/a> On Tuesday, Elon Musk\u2019s AI company had to briefly limit Grok\u2019s account from responding to users, and deleted the offensive posts. <\/p>\n