Can't see or select existing models on the Agent Builder

[fellipecm]

Hi, the Modern Workplace Agent has been deployed using an existing model. The agent works and the model shows as expected on the Azure Foundry Web Portal.

However while opening the Agent on the VS Code Agent Builder the model is not available, also when selecting Browse I am not able to select the model that is deployed in Foundry. Due to that reason, I am also not able to do prompts in that screen.

Extension Agent Builder does not show the model:

I can see the model when I click Browse models:

On the Azure Portal it shows the model correctly:

VS Code:
Version: 1.115.0 (Universal)
Commit: 41dd792b5e652393e7787322889ed5fdc58bd75b
Date: 2026-04-07T22:04:57Z (2 days ago)
Electron: 39.8.5
ElectronBuildId: 13703022
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.4.0

AI Toolkit extension version: 0.34.0

Microsoft Foundry extension version: 0.18.0

[qinezh]

@fellipecm

1. how is the model gpt-4o-2024-11-20-Low-01 deployed from Foundry?
2. can you check if the model displayed in the left side of AI Toolkit extension?

[fellipecm]

Hi @qinezh, we deploy everything via Terraform (Cognitive Deployment) and I can see the model in the extension and portal.

Extension:

Portal:

There is actually an error and I did not notice this before, apologies:
2026-04-10 14:07:37.443 [info] [AgentApi] Successfully opened Foundry agent: Modern-Workplace-Assistant 2026-04-10 14:07:37.719 [info] Loading View: promptBuilder 2026-04-10 14:07:42.714 [info] [FoundryAgent] Loaded agent with tools: [] 2026-04-10 14:07:42.852 [error] Failed to fetch models from Microsoft Foundry catalog AxiosError: Request failed with status code 400 at nt (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:5:1426377) at IncomingMessage.<anonymous> (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:5:1441031) at IncomingMessage.emit (node:events:531:35) at IncomingMessage.emit (node:domain:489:12) at endReadableNT (node:internal/streams/readable:1698:12) at process.processTicksAndRejections (node:internal/process/task_queues:89:21) at pr.request (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:5:1453770) at process.processTicksAndRejections (node:internal/process/task_queues:103:5) at async t.CatalogApiAccessor.listModels (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:2:5328545) at async y.fetchCatalogModels (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:8:755084) at async y.listModels (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:8:753693) at async t.ModelManager.listModels (/Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:2:5293848) at async /Users/User/.vscode/extensions/ms-windows-ai-studio.windows-ai-studio-0.34.0-darwin-arm64/dist/extension.js:2:4354857

[qinezh]

@a1exwang looks like a bug to fetch models from Foundry catalog, please take a look.