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GPT-5 Codex vs Phi-4-multimodal-instruct

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

  • GPT-5 Codex has the higher intelligence index (87.1 vs 46.2)
  • Phi-4-multimodal-instruct is cheaper ($0.05 vs $1.25 per 1M input)
  • GPT-5 Codex is faster
  • GPT-5 Codex has a larger context window (400K)
GPT-5 CodexPhi-4-multimodal-instruct
Intelligence index87.146.2
DeveloperOpenAIMicrosoft
TypeMultimodalMultimodal
AccessAPI onlyOpen weights
Context window400,000 tokens128,000 tokens
Input price$1.25 / 1M$0.05 / 1M
Output price$10.00 / 1M$0.10 / 1M
Speed180 tok/s25 tok/s
ReleasedSeptember 23, 2025February 1, 2025
Parameters5600000000
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

GPT-5 Codex
Phi-4-multimodal-instruct
GPQA Diamond
83.7
31.5
Humanity’s Last Exam
25.6
4.4
LiveCodeBench
84
13.1
MMLU-Pro
86.5
48.5