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GPT-5 nano vs GPT-5 Pro

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

  • GPT-5 Pro has the higher intelligence index (88.4 vs 71.2)
  • GPT-5 nano is cheaper ($0.05 vs $15.00 per 1M input)
GPT-5 nanoGPT-5 Pro
Intelligence index71.288.4
DeveloperOpenAIOpenAI
TypeLLMLLM
AccessAPI onlyAPI only
Context window400,000 tokens400,000 tokens
Input price$0.05 / 1M$15.00 / 1M
Output price$0.40 / 1M$120.00 / 1M
Speed500 tok/s
ReleasedAugust 7, 2025October 6, 2025
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5 nano
GPT-5 Pro
GPQA Diamond
71.2
88.4
Humanity’s Last Exam
8.7
42