Next week, Grok 3.5 early beta release to SuperGrok subscribers only. It is the first AI that can, for example, accurately answer technical questions about rocket engines or electrochemistry. The Premium+ and SuperGrok plans offered by xAI provide different levels of access to the Grok AI chatbot, particularly with the recent launch of Grok 3 ...

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Link :
https://www.nextbigfuture.com/2025/04/next-week-xai-releases-grok-3-5-to-supergrok-subscribers.html