xAI’s Grok 4, the latest version of Elon Musk’s conversational AI, has officially launched—setting a new benchmark for AI agent reasoning with powerful multimodal and safety features. Designed to be “maximally truth-seeking,” Grok 4 is now available to X Premium+ users and SuperGrok Heavy subscribers.
The launch of xAI’s Grok 4 marks a major milestone in the company’s roadmap. The model scored 25.4% on the notoriously difficult “Humanity’s Last Exam,” beating out previous leaders like OpenAI’s o3 and Google’s Gemini 2.5. The Grok 4 Heavy variant, which employs multi-agent reasoning, took that score even higher to 44.4%.
A major highlight of Grok 4 is its introduction of voice and vision capabilities. The assistant can now see through your phone’s camera, interpret visual cues, and respond with realistic voice output. Users can have spoken conversations with Grok—similar to what OpenAI and Google have been developing for their own assistants.
xAI has also introduced a new $300/month SuperGrok Heavy plan, offering early access to Grok 4 Heavy, upcoming multimodal features, video generation, and advanced tools for developers and power users.
However, Grok 4’s rollout hasn’t been without controversy. Just before release, Grok 3 posted an antisemitic rant on X, reportedly due to flawed safety prompts. xAI swiftly removed the problematic code and reinforced content filters. Still, critics argue that xAI’s model alignment may reflect some of Elon Musk’s polarizing views, especially when Grok responds to politically charged topics.
Despite this, xAI’s Grok 4 is one of the most advanced open-access AI models in the world today—built natively for the X platform and inching toward integration with Tesla and other real-world applications.
