Elon Musk's xAI releases new model Grok 4 Fast, performing on par with AI models such as GPT-5.

According to the financial information APP, xAI, a generative artificial intelligence company under Elon Musk, recently announced its new reasoning model "Grok 4 Fast". According to the research released by LMArena, xAI states that Grok 4 Fast outperforms models such as OpenAI's o3-search, Google's Gemini 2.5 Pro, and GPT-5-search. The reason is that "its outstanding reasoning efficiency and intelligence density allow it to surpass larger models in practical search-related tasks."