Elon Musk's xAI has rolled out major improvements to its Grok AI chatbot, particularly the Grok-4-Fast model. Thanks to significant enhancements in reasoning and completion rates, Grok has achieved better benchmark scores. Its reasoning accuracy has increased from 77.5% to 94.1%, while non-reasoning performance has risen from 77.9% to 97.9%. Reacting to the update, Elon Musk simply posted “Grok” on X. X YouTube Playback: Elon Musk’s Platform Reportedly Introducing In-Line Playback, Allowing Users To Directly Play Videos Without Opening Google’s Platform.
Grok New Update: xAI Brings Improvements in Grok-4-Fast
— Elon Musk (@elonmusk) November 8, 2025
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