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Kimi K2.5 vs Sonar

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

  • Kimi K2.5 has the higher intelligence index (87.9 vs 56.8)
  • Kimi K2.5 is cheaper ($0.40 vs $1.00 per 1M input)
  • Kimi K2.5 has a larger context window (262K)
Kimi K2.5Sonar
Intelligence index87.956.8
DeveloperMoonshot AIPerplexity
TypeMultimodalMultimodal
AccessOpen weightsAPI only
Context window262,144 tokens127,072 tokens
Input price$0.40 / 1M$1.00 / 1M
Output price$1.90 / 1M$1.00 / 1M
Speed35 tok/s
ReleasedJanuary 27, 2026January 27, 2025
Parameters1T (32B active)
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

Kimi K2.5
Sonar
GPQA Diamond
87.9
47.1
Humanity’s Last Exam
29.4
7.3