xAI

frontier

US · Founded 2023

Elon Musk's lab. Makes Grok. Integrated with X (Twitter).

xAI was founded by Elon Musk in 2023 after his departure from OpenAI's board. The lab's Grok model is differentiated primarily by its more permissive refusal policy relative to Claude and ChatGPT, and by its native integration with X (formerly Twitter) for real-time information access.

Main models

Grok 4
Grok 3

Strengths

X integration
Permissive policy
Real-time data

Pricing

$3–$15 per million tokens

Models in the almanac

Grok 4

Official site →