Grok 4 launches

Event 8 of 20 in How xAI and Grok developed

The event

9 Jul 2025

Product

Grok 4 launches

xAI announced Grok 4 for paid consumer plans and its API, alongside a higher-tier offering called Grok 4 Heavy. Availability and model branding are distinct from verified superiority over competing systems.

xAI Open event

Sources and context

Grok 4Company statement · xAI

Sources for this event

Grok 4 xAI

Before · 28 Mar 2025
X and the AI business combine under one holding companyAfter · 6 Jan 2026
xAI reports a USD 20 billion Series E

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