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Grok 3 mini Reasoning vs Grok 4.3

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

  • Grok 4.3 has the higher intelligence index (90.1 vs 80.9)
  • Grok 3 mini Reasoning is cheaper ($0.30 vs $1.25 per 1M input)
  • Grok 4.3 is faster
Grok 3 mini ReasoningGrok 4.3
Intelligence index80.990.1
DeveloperxAIxAI
TypeLLMLLM
AccessAPI only
Context window1,000,000 tokens
Input price$0.30 / 1M$1.25 / 1M
Output price$0.50 / 1M$2.50 / 1M
Speed33 tok/s88 tok/s
ReleasedFebruary 19, 2025May 6, 2026
Parameters
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

Grok 3 mini Reasoning
Grok 4.3
GPQA Diamond
79.1
90.1
Humanity’s Last Exam
11.1
35