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Gemini 3.5 Flash vs Grok Code Fast 1

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

  • Gemini 3.5 Flash has the higher intelligence index (92.2 vs 65.3)
  • Grok Code Fast 1 is cheaper ($0.00 vs $1.50 per 1M input)
Gemini 3.5 FlashGrok Code Fast 1
Intelligence index92.265.3
DeveloperGooglexAI
TypeMultimodalLLM
AccessAPI only
Context window1,048,576 tokens
Input price$1.50 / 1M$0.00 / 1M
Output price$9.00 / 1M$0.00 / 1M
Speed221 tok/s
ReleasedMay 19, 2026August 28, 2025
Parameters
Input modalitiesText, Image, Audio, Video
Output modalitiesText

Shared benchmarks

Gemini 3.5 Flash
Grok Code Fast 1
GPQA Diamond
92.2
72.7
Humanity’s Last Exam
41
7.5