Azure OpenAI Service is a collaboration between Microsoft and OpenAI, providing access to OpenAI’s powerful models on Microsoft’s enterprise-grade Azure cloud platform.
It combines the same models as OpenAI (like GPT-4o, o3, GPT-5, etc.) with the security, compliance, and private networking capabilities of Azure.
就是把 OpenAI 的模型能力“放进 Azure 云平台”，通过 Azure 来调用 LLM。
It can build:
chatbots (ChatGPT-style apps)
Summarize documents
Extract information from text
Build RAG systems (LLM + enterprise data)
Generate code or SQL
Embed AI into enterprise apps securely
Azure OpenAI Service itself is specifically designed for OpenAI models (GPT-4o, o3, etc.). However, the broader Azure AI Foundry (which includes Azure OpenAI as a component) allows you to work with many other models, including DeepSeek, Llama, Mistral, and even Claude—but not Gemini from Google.
Where Each Model Stands on Azure
Appendix
Microsoft Foundry documentation