Update what-is-azure-ai-foundry.md

Author: sdgilley

articles/ai-foundry/what-is-azure-ai-foundry.md

@@ -59,6 +59,7 @@ This table summarizes features available in the two project types:
 | --- | --- | --- |
 | Agents | ✅ (GA) | ✅ (Preview only) |
 | Azure OpenAI models | ✅ (Native support) | Available via connections |
+| AI Foundry API to work with agents and across models| ✅ (Native support) | Available via connections |
 | Project files (directly upload files and start experimenting) | ✅ | |
 | Project-level isolation of files and outputs | ✅ | ✅|
 | Evaluations | ✅ | ✅ |