said 23 Aug 2025
The @xAI Grok 2.5 model, which was our best model last year, is now open source. Grok 3 will be made open source in about 6 months.
Missed promise
Live
Late by
7m 12d
and 15h 46m 54s
— Elon Musk, primary source
X post announcing the release of Grok 2.5's weights.
What happened: As of October 2026, xAI has not released Grok 3's weights.
due 23 Feb 2026
Receipt · archived original X post, Aug 23 2025 (opens in a new tab)