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Gemini 3.5 Flash vs gpt-oss-120b

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

  • Gemini 3.5 Flash has the higher intelligence index (92.2 vs 79.6)
  • gpt-oss-120b is cheaper ($0.04 vs $1.50 per 1M input)
  • gpt-oss-120b is faster
  • Gemini 3.5 Flash has a larger context window (1M)
Gemini 3.5 Flashgpt-oss-120b
Intelligence index92.279.6
DeveloperGoogleOpenAI
TypeMultimodalLLM
AccessAPI onlyOpen weights
Context window1,048,576 tokens131,072 tokens
Input price$1.50 / 1M$0.04 / 1M
Output price$9.00 / 1M$0.18 / 1M
Speed221 tok/s500 tok/s
ReleasedMay 19, 2026August 5, 2025
Parameters117B (5.1B active)
Input modalitiesText, Image, Audio, VideoText
Output modalitiesTextText

Shared benchmarks

Gemini 3.5 Flash
gpt-oss-120b
GPQA Diamond
92.2
80.9
Humanity’s Last Exam
41
19