Frontier model developer; builds Grok and, with Supermicro, the Memphis gigawatt datacenter. It enters the corpus with Tesla using Grok to design its chips. In the recursive-self-improvement strand it appears for the report that it used Claude to build Grok until cut off, for a co-founder’s resignation warning of live loops within a year, and for Grok 4.3 improving every few days. It was acquired by SpaceX in February 2026.
Organization
xAI
Elon Musk's frontier lab, builder of Grok and co-builder of the Memphis gigawatt datacenter; acquired by SpaceX in February 2026.
Sources
Attribution and reporting linked by this record; links do not imply independent verification.
- Welcome to December 11, 2025 (theinnermostloop.substack.com)
Development timeline
Newest reporting dates first. Reporting dates may differ from event dates.
Knowledge graphopen in browser →
Cite or correct this record
Suggest a correction — opens a GitHub draft for you to review and submit.