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Gemini 3.1 Flash Lite vs Sonar Reasoning Pro

Google vs Perplexity — benchmarks, pricing, and capabilities side by side.

  • Sonar Reasoning Pro has the higher intelligence index (95.7 vs 82.2)
  • Gemini 3.1 Flash Lite is cheaper ($0.25 vs $2.00 per 1M input)
  • Gemini 3.1 Flash Lite has a larger context window (1M)
Gemini 3.1 Flash LiteSonar Reasoning Pro
Intelligence index82.295.7
DeveloperGooglePerplexity
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window1,048,576 tokens128,000 tokens
Input price$0.25 / 1M$2.00 / 1M
Output price$1.50 / 1M$8.00 / 1M
Speed342 tok/s
ReleasedMay 7, 2026March 7, 2025
Parameters
Input modalitiesText, Image, Video, AudioText, Image
Output modalitiesTextText