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GPT-4.1 Nano vs Kimi K2.5

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

  • Kimi K2.5 has the higher intelligence index (87.9 vs 42.1)
  • GPT-4.1 Nano is cheaper ($0.10 vs $0.40 per 1M input)
  • GPT-4.1 Nano is faster
  • GPT-4.1 Nano has a larger context window (1M)
GPT-4.1 NanoKimi K2.5
Intelligence index42.187.9
DeveloperOpenAIMoonshot AI
TypeMultimodalMultimodal
AccessAPI onlyOpen weights
Context window1,047,576 tokens262,144 tokens
Input price$0.10 / 1M$0.40 / 1M
Output price$0.40 / 1M$1.90 / 1M
Speed200 tok/s35 tok/s
ReleasedApril 14, 2025January 27, 2026
Parameters1T (32B active)
Input modalitiesImage, TextText, Image
Output modalitiesTextText

Shared benchmarks

GPT-4.1 Nano
Kimi K2.5
GPQA Diamond
50.3
87.9
Humanity’s Last Exam
3.9
29.4