AI Hub
← All models

Gemini 3.5 Flash vs o3 Pro

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

  • Gemini 3.5 Flash has the higher intelligence index (92.2 vs 84.5)
  • Gemini 3.5 Flash is cheaper ($1.50 vs $20.00 per 1M input)
  • Gemini 3.5 Flash is faster
  • Gemini 3.5 Flash has a larger context window (1M)
Gemini 3.5 Flasho3 Pro
Intelligence index92.284.5
DeveloperGoogleOpenAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window1,048,576 tokens200,000 tokens
Input price$1.50 / 1M$20.00 / 1M
Output price$9.00 / 1M$80.00 / 1M
Speed221 tok/s25 tok/s
ReleasedMay 19, 2026June 10, 2025
Parameters
Input modalitiesText, Image, Audio, VideoText, Image
Output modalitiesTextText

Shared benchmarks

Gemini 3.5 Flash
o3 Pro
GPQA Diamond
92.2
84.5