Grok 4 Heavy

Grok 4 Heavy ranks first on AIME 2025.

xAI Released 10 Jul 2025 Family Grok 4 The lab's model card

Benchmarks with a score

Ranked first, out of five or more models

In the top three

xAI Jul 2025

Closed weights Flagship

No Epoch Capabilities Index score yet

Where it ranks

Its best score on each benchmark, and where that ranks among every model with a score there. We rank each model once, at its best setting.

Benchmark	Score		Rank	Source
Humanity's Last Exam	44.4%		#51 of 147	Model card

Benchmark	Score	Rank	Source
AIME 2025	100%	#1 of 143	Model card
GPQA Diamond	88.4%	#43 of 284	Model card
HMMT 2025	96.7%	#10 of 49	Model card
USAMO 2025	61.9%	#1 of 2	Model card
FrontierMath Tier 4	2.08%	#41 of 55	Epoch AI

Benchmark	Score		Rank	Source
LiveCodeBench	79.4%		#14 of 73	Model card

The benchmarks the lab chose to headline, with the scores it gave.

Grok 4 9 Jul 2025