Grok 4 Heavy
Grok 4 Heavy is an announced but not yet released language model from xAI, released July 10, 2025.
We have made further progress on parallel test-time compute, which allows Grok to consider multiple hypotheses at once. We call this model Grok 4 Heavy, and it sets a new standard for performance and reliability.
Check it against your own PC →
Lab
xAI
Released
July 10, 2025
Weights
announced but not yet released
Parameters
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Context
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Price / M tokens
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Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for Grok 4 Heavy yet. New models are usually evaluated within days to weeks.
Links
More from xAI
Grok 4.7 · Grok 4.6 · Grok 4.5 · Grok 4.3 Beta · Grok Build 0.1 · Grok 4.20 Multi-Agent · Grok 4.20 · Grok 4.1 Fast