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Foundry Portal: New vs Classic

🏭 What Is Microsoft Foundry? 5 min 50 BASE XP

Two Portal Experiences

As of 2026, the Foundry portal at ai.azure.com offers two distinct experiences accessible via a toggle in the top banner:

FeatureFoundry (New)Foundry (Classic)
FocusAgent-first, streamlinedFull ML lifecycle, hub-based projects
Project TypeFoundry resource (simplified)Hub + Project (Azure ML workspace)
Prompt FlowNot available (use Agent Framework)Available (retiring April 2027)
Agent ServiceFull supportLimited
Model CatalogFull accessFull access
Recommended ForNew projects, agent developmentLegacy projects, Prompt Flow users
🚧 Important: Prompt Flow in the classic portal has ended development and is scheduled for retirement on April 20, 2027. Microsoft recommends migrating to the Microsoft Agent Framework for new orchestration workloads.

When to Use Which

  • Use New Portal for all new projects — it's the future of the platform
  • Use Classic Portal only if you have existing hub-based projects or need Prompt Flow features not yet migrated
  • Don't start new projects in Classic — they will need migration eventually
FOUNDRY VERIFICATION
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What is happening to Prompt Flow in the Azure AI Foundry Classic portal?
It's being expanded
It has ended development and is retiring April 2027
It's being made the default
It's being open-sourced
Watch: 139x Rust Speedup
Foundry Portal: New vs Classic | What Is Microsoft Foundry? — Azure Foundry Academy