AI Hub
← All models

GPT-4.1 Nano vs GPT-5.1-Codex

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

  • GPT-5.1-Codex has the higher intelligence index (88.2 vs 42.1)
  • GPT-4.1 Nano is cheaper ($0.10 vs $1.25 per 1M input)
  • GPT-4.1 Nano is faster
  • GPT-4.1 Nano has a larger context window (1M)
GPT-4.1 NanoGPT-5.1-Codex
Intelligence index42.188.2
DeveloperOpenAIOpenAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window1,047,576 tokens400,000 tokens
Input price$0.10 / 1M$1.25 / 1M
Output price$0.40 / 1M$10.00 / 1M
Speed200 tok/s188 tok/s
ReleasedApril 14, 2025November 13, 2025
Parameters
Input modalitiesImage, TextText, Image
Output modalitiesTextText

Shared benchmarks

GPT-4.1 Nano
GPT-5.1-Codex
AIME 2025
24
95.7
GPQA Diamond
50.3
86
Humanity’s Last Exam
3.9
23.4
LiveCodeBench
32.6
84.9
MMLU-Pro
65.7
86