agent-framework-openai

OpenAI integration for Microsoft Agent Framework.

This package provides:

OpenAIChatClient for the OpenAI Responses API
OpenAIChatCompletionClient for the Chat Completions API
OpenAIEmbeddingClient for embeddings

Installation

pip install agent-framework-openai

Which chat client should I use?

Use OpenAIChatClient for new work unless you specifically need the Chat Completions API.

OpenAIChatClient uses the Responses API and is the preferred general-purpose chat client.
OpenAIChatCompletionClient uses the Chat Completions API and is mainly for compatibility with existing Chat Completions-based integrations.

The previous deprecated Responses alias has been removed. Use OpenAIChatClient directly.

Environment variables

OpenAI

These variables are used when the client is configured for OpenAI:

Variable	Purpose
`OPENAI_API_KEY`	OpenAI API key
`OPENAI_ORG_ID`	OpenAI organization ID
`OPENAI_BASE_URL`	Custom OpenAI-compatible base URL
`OPENAI_MODEL`	Generic fallback model
`OPENAI_CHAT_MODEL`	Preferred model for `OpenAIChatClient`
`OPENAI_CHAT_COMPLETION_MODEL`	Preferred model for `OpenAIChatCompletionClient`
`OPENAI_EMBEDDING_MODEL`	Preferred model for `OpenAIEmbeddingClient`

Model lookup order:

OpenAIChatClient: OPENAI_CHAT_MODEL -> OPENAI_MODEL
OpenAIChatCompletionClient: OPENAI_CHAT_COMPLETION_MODEL -> OPENAI_MODEL
OpenAIEmbeddingClient: OPENAI_EMBEDDING_MODEL -> OPENAI_MODEL

These model variables are only consulted when you do not pass model= directly. In other words, OpenAIChatClient(model="...") ignores OPENAI_CHAT_MODEL, and OpenAIChatCompletionClient(model="...") ignores OPENAI_CHAT_COMPLETION_MODEL.

Azure OpenAI

These variables are used when the client is configured for Azure OpenAI:

Variable	Purpose
`AZURE_OPENAI_ENDPOINT`	Azure OpenAI resource endpoint
`AZURE_OPENAI_BASE_URL`	Full Azure OpenAI base URL (`.../openai/v1`)
`AZURE_OPENAI_API_KEY`	Azure OpenAI API key
`AZURE_OPENAI_API_VERSION`	Azure OpenAI API version
`AZURE_OPENAI_MODEL`	Generic fallback deployment
`AZURE_OPENAI_CHAT_MODEL`	Preferred deployment for `OpenAIChatClient`
`AZURE_OPENAI_CHAT_COMPLETION_MODEL`	Preferred deployment for `OpenAIChatCompletionClient`
`AZURE_OPENAI_EMBEDDING_MODEL`	Preferred deployment for `OpenAIEmbeddingClient`

Deployment lookup order:

OpenAIChatClient: AZURE_OPENAI_CHAT_MODEL -> AZURE_OPENAI_MODEL
OpenAIChatCompletionClient: AZURE_OPENAI_CHAT_COMPLETION_MODEL -> AZURE_OPENAI_MODEL
OpenAIEmbeddingClient: AZURE_OPENAI_EMBEDDING_MODEL -> AZURE_OPENAI_MODEL

For Azure routing, the same rule applies: the client-specific deployment variable is checked first, then the generic AZURE_OPENAI_MODEL fallback. Passing model= overrides both environment variables.

When both OpenAI and Azure environment variables are present, the generic clients prefer OpenAI when OPENAI_API_KEY is configured. To use Azure explicitly, pass azure_endpoint or credential.

OpenAI example

from agent_framework.openai import OpenAIChatClient

client = OpenAIChatClient(model="gpt-4.1")

Azure OpenAI example

from azure.identity.aio import AzureCliCredential

from agent_framework.openai import OpenAIChatClient

client = OpenAIChatClient(
    model="my-responses-deployment",
    azure_endpoint="https://my-resource.openai.azure.com",
    credential=AzureCliCredential(),
)

ChatClient vs ChatCompletionClient

Use OpenAIChatClient when you want the Responses API as your default chat surface.

Use OpenAIChatCompletionClient when you specifically need the Chat Completions API:

from agent_framework.openai import OpenAIChatCompletionClient

client = OpenAIChatCompletionClient(model="gpt-4o-mini")

Metadata

Release files for agent-framework-openai 1.14.1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for agent-framework-openai 1.14.1
File	Size	Uploaded
agent_framework_openai-1.14.1.tar.gz	61.0 kB	Aug 28, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for agent-framework-openai 1.14.1
File	Interpreter	ABI	Platform	Reset
agent_framework_openai-1.14.1-py3-none-any.whl 66.3 kB Aug 28, 2026	Python 3	none	any	Details

Total release size: 127.2 kB

Release files / agent_framework_openai-1.14.1.tar.gz

Download URL	agent_framework_openai-1.14.1.tar.gz
Size	61.0 kB
Tags	Source
SHA-256 checksum How to use checksums	`b255ec3979aa4dcaf894144511ce08cca163f7e1bb5aa7d0fb6da4b44de92c38`
BLAKE2b-256 checksum How to use checksums	`1fe185c4f4ae54440f950913d206be6de6c5e06e82c8cd76358c92bff791fe66`
Upload date	Aug 28, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.5 {"installer":{"name":"uv","version":"0.12.5","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":null,"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":null}`

Release files / agent_framework_openai-1.14.1-py3-none-any.whl

Download URL	agent_framework_openai-1.14.1-py3-none-any.whl
Size	66.3 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`93dc402f90dd8f5c38acf17e720d1bbc202af29f279641caa206acbc84a14bb4`
BLAKE2b-256 checksum How to use checksums	`68fea5014f619abf032b48db78db3d1a3896f5ebf3830c6b451ab5714e79d0fa`
Upload date	Aug 28, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.12.5 {"installer":{"name":"uv","version":"0.12.5","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":null,"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":null}`