Azure Functions changelog 2025

Service Bus SDK type bindings for Node.js function apps, exposing ServiceBusMessageContextPreview

Custom handlers supported, allowing languages such as Go, Rust and DenoGA

Export logs, traces and metrics using open standards; works with .NET isolated, Java, JavaScript, Python, PowerShell…GA

Migration guides from Consumption plan and AWS Lambda, with CLI commands and Copilot help

Host stateless remote MCP servers from Python, TypeScript, C# and Java SDKs on Flex ConsumptionPreview

Dedicated SKU is generally available; Consumption SKU enters public preview for pay-as-you-go billingGA

Build tools with remote MCP servers on Azure FunctionsGA

Develop locally with Java 25 and deploy on Windows and LinuxPreview

Develop locally with Node.js 24 and deploy on Windows and Linux; new Windows apps default to 64-bitPreview

Durable extension adds stateful sessions and multi-agent orchestration for C# and Python agentsPreview

Zero-downtime deployments in the Flex Consumption plan by draining and replacing instances in batchesPreview

Support ends April 30, 2026; upgrade apps to Node.js 22Deprecation

New 'AzureLinux3' OS SKU enum migrates from Azure Linux 2.0 without a Kubernetes upgradeGA

Develop and deploy Python 3.13 functions, with opt-in runtime version controlGA

Availability zones, now also in East US and Southeast Asia, plus network restricted Key Vault referencesGA

Retiring September 30, 2028; migrate to Flex ConsumptionDeprecation

Tracing V2 supports all language SDKs, durable entities and expanded span detailsGA

Supports .NET 10 on Linux and Windows, isolated worker model only; Linux Consumption not supportedPreview

Adds Python 3.13 support with opt-in runtime version control; drops custom worker extensions and shared memoryPreview

Real-time code analyzer for .NET isolated orchestration constraints, enabled by default from v1.6.0Preview

Node.js 22 support on all Linux and Windows plansGA

Adds 512 MB instance size and diagnostic settings for logs and metricsGA

Kafka extension supported in the Consumption plan, scaling elastically on Kafka messagesPreview

Version orchestrations and workers for .NET isolated apps and durable task SDK for .NETPreview

Standalone module in PowerShell Gallery adds sub-orchestrations, better exception and null-value handling…GA

Expanded OpenTelemetry support for function executions, building on last year's limited previewPreview

Functions can serve as custom tools that AI agents callGA

Native hosting of Functions on Container Apps by setting kind=functionappPreview

Adds availability zones in 12 regions and a 512 MB instance sizePreview

Python Functions can use Blob SDK types, allowing large blob downloads and uploadsGA

Stream HTTP requests and responses using FastAPI request and response APIsGA

SDK types for Blob Storage, Service Bus, Cosmos DB and Event Hubs bindingsPreview

New major extension version with better Storage v2 cost efficiency and a breaking change for in-process C# appsGA

Aspire dashboard for .NET 8 projects is accessible in the Azure PortalGA

Apps can now be created in 24 more regions; pricing available by July 1stRegion

Adds Java support, server instructions and metadata, required tool properties and instrumentationPreview

Develop functions with Python 3.12 locally and deploy to all plansGA

Available in Consumption plan, scaling apps to zero based on SQL changesGA

Triggers and bindings for building tools with remote MCP using server-sent eventsPreview

Support ends March 31, 2028; durable task scheduler is the recommended replacementDeprecation

Support ends October 31, 2025; upgrade apps to Python 3.11Deprecation

New managed storage provider for durable functions in Azure FunctionsPreview

Develop with Python 3.12 locally and deploy to all Functions plansPreview