* Bump Python package versions for 1.2.0 release Released tier bumps 1.1.1 -> 1.2.0 (core, openai, foundry, root) to reflect additive public APIs landed since 1.1.0: functional workflow API (#4238) and FunctionTool SKIP_PARSING sentinel (#5424). All beta packages stamped 1.0.0b260424, alpha packages 1.0.0a260424. All 26 non-core agent-framework-core floors raised to >=1.2.0,<2. CHANGELOG consolidates the never-tagged 1.1.1 entries with the post-merge additions into [1.2.0]. * Update CHANGELOG footer links for 1.2.0 Advance [Unreleased] comparison base from python-1.1.0 to python-1.2.0 and add a [1.2.0] reference link comparing python-1.1.0...python-1.2.0 so the heading links resolve correctly. * Fix CHANGELOG: restore [1.1.1] section and add proper [1.2.0] Previous commit incorrectly renamed the [1.1.1] header to [1.2.0], which wiped the historical 1.1.1 entries and wrongly attributed them to 1.2.0. This restores [1.1.1] to its origin/main content and adds a new [1.2.0] section above containing only the commits in python-1.1.1..HEAD: - #4238 functional workflow API - #5142 GitHub Copilot OpenTelemetry - #2403 A2A bridge support - #5070 oauth_consent_request events in Foundry clients - #5447 FoundryAgent hosted agent sessions - #5459 hosting server dependency upgrade + types - #5389 AG-UI reasoning/multimodal parsing fix - #5440 stop [TOOLBOXES] warning spam - #5455 user agent prefix fix Also corrects the [1.2.0] compare base to python-1.1.1 (not 1.1.0) and adds the missing [1.1.1] reference link.
agent-framework-openai
OpenAI integration for Microsoft Agent Framework.
This package provides:
OpenAIChatClientfor the OpenAI Responses APIOpenAIChatCompletionClientfor the Chat Completions APIOpenAIEmbeddingClientfor 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.
OpenAIChatClientuses the Responses API and is the preferred general-purpose chat client.OpenAIChatCompletionClientuses 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_MODELOpenAIChatCompletionClient:OPENAI_CHAT_COMPLETION_MODEL->OPENAI_MODELOpenAIEmbeddingClient: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_MODELOpenAIChatCompletionClient:AZURE_OPENAI_CHAT_COMPLETION_MODEL->AZURE_OPENAI_MODELOpenAIEmbeddingClient: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")