A few months after the release of Grok-4, Elon Musk’s startup, xAI, is now set to present its latest artificial intelligence model.
According to the Jadeh Makhsous news agency, the startup has introduced the “Grok-4 Fast” model, which offers faster and more efficient reasoning compared to its predecessors. According to the company’s statement, Grok-4 Fast has a performance similar to Grok-4 but uses, on average, 40% fewer processing tokens.
xAI announced that in addition to showing results faster, Grok-4 Fast achieves the same performance as Grok-4 at 98% lower cost when performing tasks ranging from coding to web searches for quick answers.
Similar to OpenAI’s ChatGPT-5, this model includes an integrated structure that can control the transition between complex requests and its reasoning model, providing rapid responses through its non-reasoning model.
According to Jadeh Makhsous, in tests on LMArena, a platform that compares AI models, Grok-4 Fast achieved the top rank in search-related activities and eight text-related tasks. xAI has made this model available to all users, including those who use the service for free.
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