Inbizzy – Elon Musk’s AI company, xAI, officially launched its latest AI model, Grok 4, on Wednesday evening local time. Alongside the release, xAI introduced a new premium subscription plan, SuperGrok Heavy, priced at $300 per month.
Grok is xAI’s answer to rival models such as OpenAI’s ChatGPT and Google’s Gemini. The model is capable of analyzing images and responding to complex queries. In recent months, Grok has been increasingly integrated into X (formerly known as Twitter), now fully owned by xAI.
According to Musk, Grok 4 surpasses PhD-level performance across a wide range of academic disciplines. “When it comes to answering academic questions, Grok 4 outperforms PhD level in all subjects, without exception,” Musk claimed during a livestream event. He also admitted that while Grok occasionally lacks common sense and has yet to deliver major breakthroughs, he considers this “a matter of time.”
xAI has launched two versions of the new model:
- Grok 4
- Grok 4 Heavy.
The latter is a multi-agent model, capable of solving problems by deploying multiple AI agents in parallel. Each agent works independently before comparing results to determine the best solution — a process likened to collaborative problem-solving.
In terms of performance, xAI claims Grok 4 achieves frontier-level results on several AI benchmarks. On Humanity’s Last Exam, a comprehensive test assessing an AI’s ability to answer thousands of questions in math, humanities, and science, Grok 4 scored 25.4% without tools, surpassing Gemini 2.5 Pro (21.6%) and OpenAI o3 (high) (21%). With tool assistance, Grok 4 Heavy scored 44.4%, significantly outperforming Gemini 2.5 Pro’s 26.9%.
Grok 4 also excelled in the ARC-AGI-2 benchmark hosted by nonprofit Arc Prize, which evaluates visual pattern recognition using puzzle-like problems. Grok achieved a score of 16.2%, nearly double the best-performing commercial model, Claude Opus 4.
As part of its commercial strategy, xAI launched the SuperGrok Heavy subscription, now the highest-priced plan among major AI providers. Subscribers receive early access to Grok 4 Heavy and other exclusive features. The pricing aligns xAI with premium offerings from competitors like OpenAI, Google, and Anthropic.
In its short-term roadmap, xAI plans to release several products over the coming months:
- A code-generation AI model in August
- A multimodal agent in September
- A video-generation model in October 2025
Grok 4 will also be made available via API, enabling developers to build applications powered by Grok. Although xAI’s enterprise division has only been active for two months, the company is already seeking partnerships with hyperscale cloud providers to expand distribution.
