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Grok-4 Heavy vs Phi-3.5-vision-instruct

xAI vs Microsoft — benchmarks, pricing, and capabilities side by side.

  • Grok-4 Heavy has the higher intelligence index (89.3 vs 61.7)
Grok-4 HeavyPhi-3.5-vision-instruct
Intelligence index89.361.7
DeveloperxAIMicrosoft
TypeMultimodalMultimodal
AccessAPI onlyOpen weights
Context window
Input price
Output price
Speed
ReleasedJuly 9, 2025August 23, 2024
Parameters4200000000
Input modalities
Output modalities