xAI has launched Grok 4.20 live in Beta. Estimated Arena (LMArena) Elo for Grok 4.20: ~1505–1535 provisional (Grok 4.20 analysis). Reasoning: Grok 4.1 Thinking is already at 1483. The multi-agent council + extra inference-time compute + engineering/coding gains + hallucination reduction typically add 20–60 Elo points in crowd-sourced arenas (see historical jumps from single → ...

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Link :
https://www.nextbigfuture.com/2026/02/xai-launches-grok-4-20-and-it-has-4-ai-agents-collaborating.html