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Grok 4.20 0309 vs Kimi K2 Instruct

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

  • Grok 4.20 0309 has the higher intelligence index (88.5 vs 66.5)
  • Kimi K2 Instruct is cheaper ($0.57 vs $2.00 per 1M input)
  • Grok 4.20 0309 is faster
Grok 4.20 0309Kimi K2 Instruct
Intelligence index88.566.5
DeveloperxAIMoonshot AI
TypeLLMLLM
AccessOpen weights
Context window131,072 tokens
Input price$2.00 / 1M$0.57 / 1M
Output price$6.00 / 1M$2.30 / 1M
Speed97 tok/s45 tok/s
ReleasedMarch 10, 2026July 11, 2025
Parameters1000000000000
Input modalities
Output modalities

Shared benchmarks

Grok 4.20 0309
Kimi K2 Instruct
GPQA Diamond
88.5
75.1
Humanity’s Last Exam
30
4.7