AI Rankings

xAI

Grok 4 Heavy

xAI's July 2025 Grok 4 variant that runs parallel test-time compute, offered through the SuperGrok Heavy plan; since followed by Grok 4.20, 4.5, 4.6 and 4.7.

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Our editorial assessment, based on the public sources listed below. Last reviewed .

Overall rank
#57
Tier
A
Score
74.9
Main category
Overall

Strengths

  • Integrates real-time search directly into the model
  • Native tool use for more complex tasks
  • Uses parallel test-time compute on harder reasoning problems

Considerations

  • Access is limited to the SuperGrok Heavy subscription
  • Several generations old; xAI's API lineup now lists Grok 4.7 as its latest flagship

Price

SuperGrok Heavy subscription ($300/mo); not listed in the xAI API model catalog

Shown for reference — price is not part of the score.

Score breakdown

Performance
78.0
55% of score
Reputation
80.0
35% of score
Recency
40.0
10% of score

The overall score combines these sub-scores using the weights shown. How we score →

Verification status

Each field carries its own re-verification date. Amber means older than 90 days — treat those figures as stale until re-checked.

Pricing
Benchmark
Reputation
Feature list

Checked against the sources listed below.

Sources

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