Version history

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

1 - Nov 411.5 - Mar 281.52 - Aug 13224 - Jul 9 4 Heavy - Jul 9 Expand to show separately2 releases4 Fast - Sep 194 Fast24.1 - Nov 17 4.1 Fast - Nov 19 Expand to show separately2 releases4.5 - Jul 84.52023 Q42024 Q12024 Q22024 Q32024 Q42025 Q12025 Q22025 Q32025 Q42026 Q12026 Q22026 Q3
AI Model

Grok

bySpaceXAI

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

Latest version:4.5Released

All Versions

Grok 4.5

Released
Released on July 8, 2026

Grok 4.1 Fast

Released
Released on November 19, 2025

Grok 4.1

Released
Released on November 17, 2025

Grok 4 Fast

Released
Released on September 19, 2025

Grok 4

Released
Released on July 9, 2025

Grok 4 Heavy

Released
Released on July 9, 2025

Grok 2

Released
Released on August 13, 2024

Grok 1.5

Released
Released on March 28, 2024

Grok 1

Released
Released on November 4, 2023