xAI is improving Grok 4 all the time. It is already one of the best AI models around. You can access it on the web or your mobile phone. Grok 4 Heavy subscribers can rely on a team of experts to get the most out of this model. The iOS app now has an auto feature, which means it can select from heavy, expert and fast mode automatically depending on your prompt.
Grok for iOS also has a kids mode lock with PIN or Face ID support. The thinking box has been improved with more details. The most recent version supports notifications for companions.
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