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GPT-4o-mini vs GPT-5.2-Codex

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

  • GPT-5.2-Codex has the higher intelligence index (89.9 vs 49.1)
  • GPT-4o-mini is cheaper ($0.15 vs $1.75 per 1M input)
  • GPT-5.2-Codex is faster
  • GPT-5.2-Codex has a larger context window (400K)
GPT-4o-miniGPT-5.2-Codex
Intelligence index49.189.9
DeveloperOpenAIOpenAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window128,000 tokens400,000 tokens
Input price$0.15 / 1M$1.75 / 1M
Output price$0.60 / 1M$14.00 / 1M
Speed92 tok/s106 tok/s
ReleasedJuly 18, 2024January 14, 2026
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText

Shared benchmarks

GPT-4o-mini
GPT-5.2-Codex
GPQA Diamond
40.2
89.9
Humanity’s Last Exam
4
33.5