Overview
- The release includes Grok 4.1 Thinking, which uses step-by-step reasoning tokens, and a faster non-reasoning mode designed for direct responses.
- LMArena/Text Arena’s early results rank the Thinking model first with an Elo near 1,500, reflecting a gain of more than 40 points over the prior Grok4Fast entry.
- xAI says Grok 4.1 cuts hallucinations roughly threefold, citing internal evaluations showing a drop from about 12% to about 4% on real‑world queries and FActScore tests.
- Reporting on the staged rollout from November 1–14 says blind pairwise live‑traffic tests showed a 64.78% user preference for Grok 4.1 over the previous production model.
- Grok 4.1 is available now on grok.com, X, and the Grok iOS and Android apps, with free access for all users and higher limits for paying subscribers.