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GPT-5.1 vs Kimi K2.6

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

  • GPT-5.1 has the higher intelligence index (89 vs 74.9)
  • Kimi K2.6 is cheaper ($0.73 vs $1.25 per 1M input)
  • GPT-5.1 is faster
  • GPT-5.1 has a larger context window (400K)
GPT-5.1Kimi K2.6
Intelligence index8974.9
DeveloperOpenAIMoonshot AI
TypeLLMLLM
AccessAPI onlyOpen weights
Context window400,000 tokens262,144 tokens
Input price$1.25 / 1M$0.73 / 1M
Output price$10.00 / 1M$3.49 / 1M
Speed115 tok/s57 tok/s
ReleasedNovember 12, 2025April 20, 2026
Parameters1T (32B active)
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5.1
Kimi K2.6
GPQA Diamond
88.1
91.1
Humanity’s Last Exam
26.5
35.9