waypoints.si The sky Every system The lead Countries Forecast revisions
Grok 4 Heavy
xAI, 10 Jul 2025.
- Lab
- xAI
- Released
- 10 Jul 2025
- Kind
- Language, Language modeling/generation
- Training compute
- Not disclosed
- Parameters
- Not disclosed
- Organisations
- xAI
- Country
- United States
See it in the 3D sky Paper or announcement
Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.