xAI releases Grok 4.1
Released Grok 4.1 — the Thinking version ranked first on the LMArena text leaderboard at 1483 Elo. Applied large-scale RL using frontier reasoning models as reward evaluators
Why it matters
A release that made emotional and creative interaction an explicit optimization target
Source — Primary sources first; secondary reports are labelled “Press”
Officialx.aihttps://x.ai/news/grok-4-1Added in Week 35, 2026 · See that week