xAI released Grok 4.1, which topped agentic benchmarks and sharply cut hallucinations — down to 4.22% from 12.09% on xAI's evaluations. The update also brought a warmer, more personable default personality.

Grok 4.1's hallucination reduction addressed one of the line's longest-standing weaknesses. xAI pitched it as the model that finally paired Grok's real-time X awareness with trustworthy answers.

The release kept xAI competitive through the intense November 2025 three-lab shootout, holding the line while rivals shipped their own flagships within days.