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GPT-5.4 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 74.9)
  • Grok 4.3 is cheaper ($1.25 vs $2.50 per 1M input)
  • Grok 4.3 is faster
  • GPT-5.4 has a larger context window (1.1M)
GPT-5.4Grok 4.3
Intelligence index74.990.1
DeveloperOpenAIxAI
TypeLLMLLM
AccessAPI onlyAPI only
Context window1,050,000 tokens1,000,000 tokens
Input price$2.50 / 1M$1.25 / 1M
Output price$15.00 / 1M$2.50 / 1M
Speed84 tok/s88 tok/s
ReleasedMarch 5, 2026May 6, 2026
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5.4
Grok 4.3
GPQA Diamond
92
90.1
Humanity’s Last Exam
41.6
35