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Grok 4.1 Has Arrived — and It's Bringing the Fight to ChatGPT with These New Features

Grok 4.1 offers up to 3 times fewer hallucinations and leads LMArena’s Text Arena leaderboard with a 40+ point score increase, improving user experience and speed.

  • Earlier this month, Elon Musk-owned xAI rolled out Grok 4.1 after November 1–14, 2025 subset testing, with 64.78% blind pairwise live-traffic preference, now on grok.com, x.com, and apps.
  • XAI built Grok 4.1 to reduce hallucinations from 12% to about 4%, using reasoning tokens for step-by-step responses and faster direct replies.
  • LMArena shows Grok 4.1 Thinking scored 1,510 and 1,483, with a 40+ point gain over Grok4Fast two months ago.
  • Free-Tier users can test Grok 4.1 instantly via a grok.com popup offering five model options, four free, while paying customers face fewer limits.
  • Rivals include OpenAI's GPT 5.1, which recently shipped improvements, and Google's Gemini 3 soon, while xAI plans Grok 5 in Q1 2026 with double the parameters.
Insights by Ground AI

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xAI doesn’t want to lose fuel in front of OpenAI and so last night launched the new version of its AI: Grok 4.1. This comes as an update that redefines Musk’s and xAI’s ambition on three very concrete fronts: measurable overall capacity, more polished emotional intelligence and a visible reduction of hallucinations in real traffic. It looks really like a step forward, so let’s see what it has to offer. The model is already deployed in web format…

xAI is upping the ante: Grok 4.1 is now available and accessible directly on grok.com, in the X interface, and in the iOS and Android apps. The new model is already running in Auto mode, and Grok 4.1 can also be selected directly from the model selection menu... Read the full article: Grok 4.1: xAI's new model launches for all users

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Next Big Future broke the news in United States on Monday, November 17, 2025.
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