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GPT-4o-mini vs Grok-4 Heavy

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

  • Grok-4 Heavy has the higher intelligence index (89.3 vs 49.1)
GPT-4o-miniGrok-4 Heavy
Intelligence index49.189.3
DeveloperOpenAIxAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window128,000 tokens
Input price$0.15 / 1M
Output price$0.60 / 1M
Speed92 tok/s
ReleasedJuly 18, 2024July 9, 2025
Parameters
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

GPT-4o-mini
Grok-4 Heavy
AIME 2025
14.7
100
GPQA Diamond
40.2
88.4
Humanity’s Last Exam
4
50.7
LiveCodeBench
23.4
79.4