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GPT-5.1 vs Phi-3.5-MoE-instruct

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

  • GPT-5.1 has the higher intelligence index (89 vs 49.8)
GPT-5.1Phi-3.5-MoE-instruct
Intelligence index8949.8
DeveloperOpenAIMicrosoft
TypeLLMLLM
AccessAPI onlyOpen weights
Context window400,000 tokens
Input price$1.25 / 1M
Output price$10.00 / 1M
Speed115 tok/s
ReleasedNovember 12, 2025August 23, 2024
Parameters60000000000
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

GPT-5.1
Phi-3.5-MoE-instruct
GPQA Diamond
88.1
36.8
MMLU-Pro
87
45.3