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GPT-5.4 mini vs Grok 4.3

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

  • Grok 4.3 has the higher intelligence index (90.1 vs 87.5)
  • GPT-5.4 mini is cheaper ($0.75 vs $1.25 per 1M input)
  • GPT-5.4 mini is faster
  • Grok 4.3 has a larger context window (1M)
GPT-5.4 miniGrok 4.3
Intelligence index87.590.1
DeveloperOpenAIxAI
TypeLLMLLM
AccessAPI onlyAPI only
Context window400,000 tokens1,000,000 tokens
Input price$0.75 / 1M$1.25 / 1M
Output price$4.50 / 1M$2.50 / 1M
Speed162 tok/s88 tok/s
ReleasedMarch 17, 2026May 6, 2026
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5.4 mini
Grok 4.3
GPQA Diamond
87.5
90.1
Humanity’s Last Exam
26.6
35