Usman Salis
⬤ Researcher Brian Roemmele called xAI's latest update "transformative," highlighting that Grok-4-Fast now handles structured logic and autonomous tasks far better than before. His tests show the model has made one of the sharpest improvements ever recorded, bringing it much closer to handling complex reasoning workloads.
⬤ The numbers tell the story: reasoning accuracy jumped from 77.5% to 94.1%, while non-reasoning tasks hit 97.9%, up from 77.9%. Released on October 29, 2025, the upgrade also cut denial and evasion rates dramatically. Grok-4-Fast, built for speed, is now matching accuracy levels that used to require slower, heavier models.
⬤ Tech commentator DogeDesigner added fuel to the buzz: "Grok just got a whole lot smarter." The performance charts back it up, showing a steep climb from the mid-70s to near-perfect scores across the board.
⬤ This upgrade could shake up the competitive AI landscape. Better reasoning makes Grok-4-Fast more viable for autonomous agents and decision support, while near-flawless non-reasoning accuracy boosts its reliability for real-time use. The industry is watching to see if xAI can keep up this pace — and where Grok goes next.
Usman Salis
