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Grok 4

xAI, 9 Jul 2025.

Lab
xAI
Released
9 Jul 2025
Kind
Language, Language modeling/generation
Training compute
5.0 × 10²⁶ FLOP
Parameters
3.0 trillion
Capability index
146.5 (Epoch)
Organisations
xAI
Country
United States

Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.