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GPT-5.2-Codex vs GPT-5 Codex

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

  • GPT-5.2-Codex has the higher intelligence index (89.9 vs 87.1)
  • GPT-5 Codex is cheaper ($1.25 vs $1.75 per 1M input)
  • GPT-5 Codex is faster
GPT-5.2-CodexGPT-5 Codex
Intelligence index89.987.1
DeveloperOpenAIOpenAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window400,000 tokens400,000 tokens
Input price$1.75 / 1M$1.25 / 1M
Output price$14.00 / 1M$10.00 / 1M
Speed106 tok/s180 tok/s
ReleasedJanuary 14, 2026September 23, 2025
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-5.2-Codex
GPT-5 Codex
GPQA Diamond
89.9
83.7
Humanity’s Last Exam
33.5
25.6