Version history

Every shipped version of this model. Click a marker to open its release page.

Hollow markers open release pages. Scroll horizontally for older releases; labels stay fixed on the left.

AI Model

Grok

xAI's frontier Grok model family for reasoning, coding, and real-time knowledge.

Latest version:4.3Rumored

All Versions

Grok 4.3

Rumored to be released on April, 2026

Why it's rumored:PiunikaWeb reported Grok 4.3 beta appearing in the SuperGrok Heavy model picker without an x.ai/news announcement; xAI had not published a model card or API pricing at the time of the first sightings.

What to expect:Stealth beta for SuperGrok Heavy with native video input, document generation (slides, PDF, spreadsheets), and a larger checkpoint Musk described as still training after the initial 500B-parameter beta.

Grok 4.1 Fast

Released on November 19, 2025

Grok 4.1

Released on November 17, 2025

Grok 4 Fast

Released on September 19, 2025

Grok 4

Released on July 9, 2025

Grok 4 Heavy

Released on July 9, 2025