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Grok 4.3 vs Kimi K2 Base

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

  • Grok 4.3 has the higher intelligence index (90.1 vs 50.2)
Grok 4.3Kimi K2 Base
Intelligence index90.150.2
DeveloperxAIMoonshot AI
TypeLLMLLM
AccessAPI onlyOpen weights
Context window1,000,000 tokens
Input price$1.25 / 1M
Output price$2.50 / 1M
Speed88 tok/s
ReleasedMay 6, 2026July 11, 2025
Parameters1000000000000
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

Grok 4.3
Kimi K2 Base
GPQA Diamond
90.1
48.1