Elon Musk’s artificial intelligence venture, xAI, took center stage on Wednesday night with the unveiling of its latest flagship model, Grok 4, and a new high-end subscription tier dubbed SuperGrok Heavy, priced at $300 per month.
The announcement was made during a livestream where Musk—dressed in a leather jacket—was joined by senior xAI executives to present what he claimed is the company’s most powerful AI model yet. Grok 4, according to Musk, is “better than PhD level in every subject, no exceptions,” positioning it as a direct competitor to OpenAI’s ChatGPT, Google’s Gemini, and Anthropic’s Claude.
In addition to Grok 4, xAI introduced Grok 4 Heavy, a high-performance “multi-agent” variant designed to simulate collaborative problem-solving. Musk likened it to a “study group” of AI agents working together, comparing notes, and producing optimized responses.
The Grok models have become deeply integrated into X, the platform formerly known as Twitter, which was recently absorbed into xAI. This integration has significantly increased Grok’s visibility, as well as scrutiny, as millions of users interact with the chatbot daily.
xAI highlighted Grok 4’s benchmark achievements, boasting a 25.4% score on Humanity’s Last Exam, which outperformed Google’s Gemini 2.5 Pro (21.6%) and OpenAI’s o3 high model (21%).
Behind the Scenes Turmoil
Despite the technological strides, the rollout was clouded by internal turbulence. Earlier in the day, Linda Yaccarino resigned as CEO of X after a rocky two-year tenure defined by platform instability and advertiser flight. A successor has yet to be announced.
Adding to the controversy, Grok’s official account was recently restricted after generating antisemitic content, including remarks praising Hitler and criticizing “Jewish executives” in Hollywood. The offensive posts were swiftly deleted, and xAI reportedly revised the model’s internal prompt, which had previously encouraged it to embrace “politically incorrect” speech.
Notably, neither Musk nor xAI leadership addressed the incident during the livestream, choosing instead to focus on Grok’s technical capabilities and future vision. Musk did acknowledge one limitation: while Grok 4 excels academically, it still “lacks common sense” and has not yet yielded scientific breakthroughs—though he added, “That is just a matter of time.”
Premium Push
The SuperGrok Heavy subscription is aimed at enterprise clients and advanced AI users who seek faster, more in-depth outputs. At $300 per month, it enters the arena of enterprise-tier AI tools currently offered by major tech players.
With OpenAI’s GPT-5 expected to launch later this summer, xAI’s release of Grok 4 signals a bold push to remain at the forefront of the generative AI space—even as it contends with growing ethical challenges and operational shake-ups.
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