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Gemini 2.5 Pro vs Gemini 3 Flash

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

  • Gemini 3 Flash has the higher intelligence index (90.2 vs 71.6)
  • Gemini 3 Flash is cheaper ($0.50 vs $1.25 per 1M input)
  • Gemini 3 Flash is faster
Gemini 2.5 ProGemini 3 Flash
Intelligence index71.690.2
DeveloperGoogleGoogle
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window1,048,576 tokens1,048,576 tokens
Input price$1.25 / 1M$0.50 / 1M
Output price$10.00 / 1M$3.00 / 1M
Speed85 tok/s191 tok/s
ReleasedMarch 25, 2025December 17, 2025
Parameters
Input modalitiesText, Image, Audio, VideoText, Image, Audio, Video
Output modalitiesTextText

Shared benchmarks

Gemini 2.5 Pro
Gemini 3 Flash
AIME 2025
88
97
GPQA Diamond
84
90.4
Humanity’s Last Exam
17.8
34.7
LiveCodeBench
80.1
90.8
MMLU-Pro
86
89
SWE-bench Verified
63.8
78