AI Hub
← All models

GPT-5.5 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 76.1)
  • GPT-5.5 is cheaper ($5.00 vs $15.00 per 1M input)
  • GPT-5.5 has a larger context window (1.1M)
GPT-5.5GPT-5 Pro
Intelligence index76.188.4
DeveloperOpenAIOpenAI
TypeLLMLLM
AccessAPI onlyAPI only
Context window1,050,000 tokens400,000 tokens
Input price$5.00 / 1M$15.00 / 1M
Output price$30.00 / 1M$120.00 / 1M
Speed67 tok/s
ReleasedApril 23, 2026October 6, 2025
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5.5
GPT-5 Pro
GPQA Diamond
93.5
88.4
Humanity’s Last Exam
44.3
42